JPH08297096A - Quality inspecting apparatus for transparent platelike material - Google Patents
Quality inspecting apparatus for transparent platelike materialInfo
- Publication number
- JPH08297096A JPH08297096A JP10240495A JP10240495A JPH08297096A JP H08297096 A JPH08297096 A JP H08297096A JP 10240495 A JP10240495 A JP 10240495A JP 10240495 A JP10240495 A JP 10240495A JP H08297096 A JPH08297096 A JP H08297096A
- Authority
- JP
- Japan
- Prior art keywords
- transparent plate
- inspected
- screen
- glass
- projected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title abstract 3
- 230000002950 deficient Effects 0.000 claims description 37
- 238000007689 inspection Methods 0.000 claims description 23
- 239000005357 flat glass Substances 0.000 abstract description 25
- 230000007547 defect Effects 0.000 abstract description 16
- 239000011521 glass Substances 0.000 abstract description 14
- 230000003287 optical effect Effects 0.000 description 7
- 230000004907 flux Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000005338 frosted glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は透明板状体の品質検査装
置に係り、特に、ドアミラー、ディスプレイ用ガラス等
の透明板状体の品質検査装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quality inspection device for a transparent plate, and more particularly to a quality inspection device for a transparent plate such as a door mirror or a glass for a display.
【０００２】[0002]
【従来の技術】従来、ドアミラー、ディスプレイ用ガラ
ス等の透明板状体の品質検査装置においては、高輝度の
点光源を使用したものが知られており、その一例が実開
平４−１２６１５１号に示されている。2. Description of the Related Art Conventionally, as a quality inspection device for a transparent plate such as a door mirror or a glass for a display, one using a high-intensity point light source is known, one example of which is disclosed in Japanese Utility Model Laid-Open No. 4-126151. It is shown.
【０００３】図４に示される如く、この透明板状体の品
質検査装置７０では、被検査透明板状体７２が、検査台
７４に固定されており、この検査台７４の近傍には、被
検査透明板状体７２に自然光に最も近いスペクトル分布
を有する高輝度の点光源を投光する光源ユニット７６が
配設されている。また、被検査透明板状体７２を挟んで
光源ユニット７６と反対側には、被検査透明板状体７２
を通る光を投影するスク−ン７８が配設されており、ス
ク−ン７８に投影することによって、被検査透明板状体
７２の表面の歪みや傷等の欠陥部の有無を容易に検査で
きるようになっている。As shown in FIG. 4, in this transparent plate quality inspection apparatus 70, an inspected transparent plate 72 is fixed to an inspection table 74. A light source unit 76 for projecting a high-intensity point light source having a spectral distribution closest to natural light is arranged on the inspection transparent plate member 72. On the side opposite to the light source unit 76 with the inspected transparent plate-like body 72 interposed, the inspected transparent plate-like body 72 is provided.
A screen 78 for projecting light passing therethrough is provided. By projecting the screen 78 onto the screen 78, it is possible to easily inspect whether there is a defect such as a distortion or a scratch on the surface of the inspected transparent plate member 72. You can do it.
【０００４】しかしながら、この透明板状体の品質検査
装置７０では、点光源を使用しているが、実際には、面
光源に近い光源のため、スク−ン７８上の投影像には、
本影部と半影部とが存在する。従って、欠陥部の投影像
の輪郭がはっきりしなくなったり、欠陥部が小さい場合
には、投影像に明確に表れない恐れがある。However, in the quality inspection device 70 for the transparent plate, a point light source is used, but in reality, since it is a light source close to a surface light source, the projected image on the screen 78 is
There are a main shadow part and a penumbra part. Therefore, if the contour of the projected image of the defective portion is not clear, or if the defective portion is small, it may not appear clearly in the projected image.
【０００５】また、スク−ン７８上の投影像をカメラ等
の撮影手段で撮影する場合には、光軸Ｐ上の被検査透明
板状体７２とスク−ン７８との間にカメラを配置できな
い。このため、図４に示される如く、スク−ン７８の斜
め前方に配設したカメラ８２でスク−ン７８上の投影像
を撮影することになり、撮影画像上で欠陥部の投影像の
輪郭及び寸法に変化が生じ測定精度が低下する。Further, when the projection image on the screen 78 is photographed by a photographing means such as a camera, the camera is arranged between the inspected transparent plate-like body 72 on the optical axis P and the screen 78. Can not. Therefore, as shown in FIG. 4, the projection image on the screen 78 is taken by the camera 82 arranged obliquely in front of the screen 78, and the outline of the projection image of the defective portion is taken on the taken image. Also, the measurement accuracy is reduced due to changes in dimensions.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記事実を考
慮し、被検査透明板状体の歪みや傷等の欠陥部の投影像
の輪郭を明確にすることができると共に、撮影手段で撮
影する場合にも撮影画像上で欠陥部の投影像の輪郭及び
寸法に変化が生じ難く測定精度が向上する透明板状体の
品質検査装置を得ることが目的である。In consideration of the above facts, the present invention is capable of clarifying the contour of a projected image of a defective portion such as a distortion or a scratch of a transparent plate to be inspected, and photographing it by a photographing means. Even in this case, it is an object of the present invention to obtain a quality inspection device for a transparent plate in which the contour and dimensions of the projected image of the defect portion are unlikely to change on the captured image and the measurement accuracy is improved.
【０００７】[0007]
【課題を解決するための手段】請求項１に記載の本発明
の透明板状体の品質検査装置は、被検査透明板状体に平
行光線を投光する光源と、前記被検査透明板状体を挟ん
で前記光源と反対側に配置され前記被検査透明板状体を
通った光を投影するための半透明の膜から成るスクリー
ンと、を有することを特徴としている。According to a first aspect of the present invention, there is provided a transparent plate-like quality inspection apparatus comprising: a light source for projecting parallel light rays onto a transparent plate-like body to be inspected; and a transparent plate-like body to be inspected. A screen made of a semi-transparent film, which is arranged on the opposite side of the light source with the body sandwiched and projects the light that has passed through the inspected transparent plate-like body.
【０００８】請求項２に記載の本発明の透明板状体の品
質検査装置は、被検査透明板状体に平行光線を投光する
光源と、前記被検査透明板状体を挟んで前記光源と反対
側に配置され前記被検査透明板状体を通った光を投影す
るための半透明の膜から成るスクリーンと、このスクリ
ーンを挟んで前記被検査透明板状体と反対側に配置され
前記スクリーンに投影された前記被検査透明板状体の欠
陥部を撮影するための撮影手段と、を有することを特徴
としている。According to a second aspect of the present invention, there is provided a quality inspection device for a transparent plate-like body, which comprises: a light source for projecting parallel rays onto the transparent plate-like body to be inspected; A screen composed of a semi-transparent film for projecting light that has passed through the transparent plate-like body to be inspected, and a screen disposed between the transparent plate-like body to be inspected with the screen sandwiched therebetween. And a photographing means for photographing a defective portion of the inspected transparent plate-like body projected on the screen.
【０００９】請求項３に記載の本発明の透明板状体の品
質検査装置は、被検査透明板状体に平行光線を投光する
光源と、前記被検査透明板状体を挟んで前記光源と反対
側に配置され前記被検査透明板状体を通った光による投
影像を直接撮影するための撮影手段と、を有することを
特徴としている。According to a third aspect of the present invention, there is provided a quality inspection apparatus for a transparent plate-like body, the light source for projecting parallel rays onto the transparent plate-like body to be inspected, and the light source sandwiching the transparent plate-like body to be inspected. And a photographing means for directly photographing a projected image of the light passing through the inspected transparent plate-shaped body on the opposite side.
【００１０】[0010]
【作用】請求項１に記載の本発明によれば、光源から被
検査透明板状体に平行光線を投光し、半透明の膜から成
るスクリーン上に投影する。この時、被検査透明板状体
に板に歪みや傷等の欠陥部があると、光源から投光され
た平行光が欠陥部において屈折して直進しないため、ス
クリーン上に投影される欠陥部の投影像と他の部位との
コントラストが大きくなり、欠陥部の投影像の輪郭が明
確になる。According to the first aspect of the present invention, parallel light rays are projected from the light source onto the transparent plate to be inspected and projected on the screen made of a semitransparent film. At this time, if the transparent plate to be inspected has a defective portion such as a distortion or a scratch on the plate, the parallel light projected from the light source is refracted at the defective portion and does not go straight, so that the defective portion projected on the screen. The contrast between the projected image of and the other part becomes large, and the contour of the projected image of the defect becomes clear.
【００１１】また、光源から平行光を投光し、且つスク
リーン上に投影された欠陥部の投影像をスクリーンの裏
側正面から、欠陥部の投影像の輪郭及び寸法を正確に観
察できるため、測定精度が向上する。Moreover, since the parallel light is projected from the light source and the projected image of the defective portion projected on the screen can be accurately observed from the front side of the back side of the screen, the contour and size of the projected image of the defective portion can be accurately measured. Accuracy is improved.
【００１２】なお、被検査透明板状体の欠陥部の光軸に
沿った断面形状が被検査透明板状体の内側へ向けて凸で
ある場合には、欠陥部の有る部位は凹レンズ状になり、
この部位を通った光は拡散する。このため、スクリーン
上に投影される欠陥部の投影像と他の部位とのコントラ
ストを大きくするためには、被検査透明板状体とスクリ
ーンとの間隔を短くすることが好ましい。When the cross-sectional shape of the defective portion of the inspected transparent plate member along the optical axis is convex toward the inside of the inspected transparent plate member, the portion having the defective portion is formed into a concave lens shape. Becomes
Light that has passed through this site is diffused. Therefore, in order to increase the contrast between the projected image of the defective portion projected on the screen and other portions, it is preferable to shorten the distance between the inspected transparent plate and the screen.
【００１３】一方、被検査透明板状体の欠陥部の光軸に
沿った断面形状が被検査透明板状体の外側へ向けて凸で
ある場合には、欠陥部の有る部位は凸レンズ状になり、
この部位を通った光束は集光する。従って、この集光し
た光がスクリーン上で投影像と重なり、投影像が不明確
になるのを防止するため、被検査透明板状体とスクリー
ンとの間隔を長くし、投影像の外側に集光させることが
好ましい。On the other hand, when the cross-sectional shape of the defective portion of the transparent plate to be inspected along the optical axis is convex toward the outside of the transparent plate to be inspected, the portion having the defective portion has a convex lens shape. Becomes
The light flux that has passed through this portion is condensed. Therefore, in order to prevent this condensed light from overlapping the projection image on the screen and making the projection image unclear, the interval between the inspected transparent plate-like body and the screen is lengthened and collected outside the projection image. It is preferable to make it light.
【００１４】請求項２に記載の本発明によれば、光源か
ら被検査透明板状体に平行光線を投光し、半透明の膜か
ら成るスクリーン上に投影する。この時、被検査透明板
状体に歪みや傷等の欠陥部があると、光源から投光され
た平行光が欠陥部において屈折して直進しないため、ス
クリーン上に投影される欠陥部の投影像と他の部位との
コントラストが大きくなり、欠陥部の投影像の輪郭を明
確にすることができる。According to the second aspect of the present invention, a parallel light beam is projected from the light source onto the transparent plate to be inspected and projected onto a screen made of a semitransparent film. At this time, if there is a defect such as a distortion or a scratch on the inspected transparent plate, the parallel light emitted from the light source is refracted at the defect and does not go straight. Therefore, the projection of the defect projected on the screen is performed. The contrast between the image and other parts is increased, and the contour of the projected image of the defect can be made clear.
【００１５】また、光源から平行光を投光し、且つスク
リーン上に投影された欠陥部の投影像をスクリーンの裏
側正面から撮影手段で撮影できるため、撮影画像上で欠
陥部の投影像の輪郭及び寸法に変化が生じ難く測定精度
が向上する。Further, since the collimated light is projected from the light source and the projected image of the defective portion projected on the screen can be photographed by the photographing means from the front side of the back side of the screen, the contour of the projected image of the defective portion on the photographed image. Also, the measurement accuracy is improved because the size hardly changes.
【００１６】請求項３に記載の本発明によれば、光源か
ら被検査透明板状体に平行光線を投光し、撮影手段に投
影する。この時、被検査透明板状体に歪みや傷等の欠陥
部があると、光源から投光された平行光が欠陥部におい
て屈折して直進しないため、撮影手段上に投影される欠
陥部の投影像と他の部位とのコントラストが大きくな
り、欠陥部の投影像の輪郭を明確にすることができる。According to the third aspect of the present invention, a parallel light beam is projected from the light source to the transparent plate to be inspected and projected onto the photographing means. At this time, if there is a defect such as a distortion or a scratch on the inspected transparent plate, the parallel light projected from the light source is refracted at the defect and does not go straight. The contrast between the projected image and other parts is increased, and the contour of the projected image of the defect can be made clear.
【００１７】また、撮影手段に被検査透明板状体の欠陥
部が直接投影されるため、スク−ンによる映像損失を低
減できる。Further, since the defective portion of the transparent plate to be inspected is directly projected onto the photographing means, the image loss due to the screen can be reduced.
【００１８】なお、被検査透明板状体の欠陥部の光軸に
沿った断面形状が被検査透明板状体の内側へ向けて凸で
ある場合には、欠陥部の有る部位は凹レンズ状になり、
この部位を通った光は拡散する。このため、撮影手段上
に投影される欠陥部の投影像と他の部位とのコントラス
トを大きくするためには、被検査透明板状体と撮影手段
との間隔を短くすることが好ましい。If the cross-sectional shape of the defective portion of the inspected transparent plate member along the optical axis is convex toward the inside of the inspected transparent plate member, the portion having the defective portion is formed into a concave lens shape. Becomes
Light that has passed through this site is diffused. Therefore, in order to increase the contrast between the projected image of the defect portion projected on the photographing means and the other part, it is preferable to shorten the distance between the transparent plate to be inspected and the photographing means.
【００１９】一方、被検査透明板状体の欠陥部の光軸に
沿った断面形状が被検査透明板状体の外側へ向けて凸で
ある場合には、欠陥部の有る部位は凸レンズ状になり、
この部位を通った光束は集光する。従って、この集光し
た光が撮影手段上で投影像と重なり、投影像が不明確に
なるのを防止するため、被検査透明板状体と撮影手段と
の間隔を長くし、投影像の外側に集光させることが好ま
しい。On the other hand, when the cross-sectional shape of the defective portion of the inspected transparent plate member along the optical axis is convex toward the outside of the inspected transparent plate member, the portion having the defective portion is formed into a convex lens shape. Becomes
The light flux that has passed through this portion is condensed. Therefore, in order to prevent the condensed light from overlapping the projected image on the photographing means and making the projected image unclear, the interval between the transparent plate to be inspected and the photographing means is lengthened, and the outside of the projected image is increased. It is preferable to focus the light on.
【００２０】[0020]
【実施例】本発明の透明板状体の品質検査装置の一実施
例について図１〜図３に従って説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the quality inspection device for transparent plate-like members of the present invention will be described with reference to FIGS.
【００２１】図１に示される如く、本実施例の透明板状
体の品質検査装置１０には、被検査透明板状体としての
透明板ガラス１２が図示を省略した検査台に固定されて
おり、この透明板ガラス１２のガラス面垂直方向には、
透明板ガラス１２に平行光線を投光する光源１４が配設
されている。なお、光源１４は、レンズを用いて点光源
からの光を平行光線に屈曲させる。または、点光源を離
れた所に置き、透明板ガラス１２と光源１４との間隔Ｌ
1 を極力長く設定する。As shown in FIG. 1, the transparent plate quality inspection apparatus 10 of this embodiment has a transparent plate glass 12 as an inspected transparent plate member fixed to an inspection table (not shown). In the direction perpendicular to the glass surface of the transparent plate glass 12,
The transparent plate glass 12 is provided with a light source 14 that projects parallel rays. The light source 14 uses a lens to bend the light from the point light source into parallel rays. Alternatively, the point light source is placed at a distance, and the distance L between the transparent plate glass 12 and the light source 14 is L.
Set 1 as long as possible.
【００２２】また、透明板ガラス１２を挟んで光源１４
と反対側には、透明板ガラス１２を通る光束を投影する
スク−ン１６が配設されており、このスク−ン１６は半
透明の膜、例えば、ポリエステルフィルム、すりガラス
等で構成されている。The light source 14 is sandwiched by the transparent plate glass 12.
A screen 16 for projecting a light beam passing through the transparent plate glass 12 is provided on the opposite side to the screen 16. The screen 16 is made of a semitransparent film such as a polyester film or frosted glass.
【００２３】スク−ン１６を挟んで透明板ガラス１２と
反対側には撮影手段としてのカメラ１８が配設されてお
り、スク−ン１６に投影される透明板ガラス１２の表面
の歪みや傷等の欠陥部１２Ａの投影像２０を撮影するよ
うになっている。A camera 18 as a photographing means is provided on the side opposite to the transparent plate glass 12 with the screen 16 interposed therebetween, and the surface of the transparent plate glass 12 projected on the screen 16 is free from distortion and scratches. The projection image 20 of the defective portion 12A is photographed.
【００２４】次に、本実施例の作用を説明する。本実施
例の透明板状体の品質検査装置１０では、光源１４から
透明板ガラス１２に平行光線を投光し、透明板ガラス１
２を通った光を半透明の膜から成るスクリーン１６上に
投影する。この時、透明板ガラス１２に歪みや傷等の欠
陥部１２Ａがあると、光源１４から投光された平行光が
欠陥部１２Ａにおいて屈折して直進しないため、スクリ
ーン１６上に投影される欠陥部１２Ａの投影像２０と、
他の部位とのコントラストが大きくなり、投影像２０の
輪郭を明確にすることができる。Next, the operation of this embodiment will be described. In the quality inspection device 10 for a transparent plate glass of the present embodiment, a parallel light beam is projected from the light source 14 to the transparent plate glass 12 to produce the transparent plate glass 1
The light passing through 2 is projected onto a screen 16 made of a semitransparent film. At this time, if the transparent plate glass 12 has a defective portion 12A such as a distortion or a scratch, the parallel light projected from the light source 14 is refracted at the defective portion 12A and does not go straight, so that the defective portion 12A projected on the screen 16 is projected. A projected image 20 of
The contrast with other parts is increased, and the contour of the projected image 20 can be made clear.
【００２５】また、透明板ガラス１２と光源１４との間
隔Ｌ1 を長極力くしたため、光源か１４ら投光された光
が透明板ガラス１２を平行に通過するため、欠陥部１２
Ａの投影像２０の輪郭を更に明確にすることができる。Further, since the distance L 1 between the transparent plate glass 12 and the light source 14 is made as long as possible, the light projected from the light source 14 passes through the transparent plate glass 12 in parallel, so that the defective portion 12 is formed.
The contour of the projected image 20 of A can be further clarified.
【００２６】なお、図２に示される如く、透明板ガラス
１２の欠陥部１２Ａの光軸Ｐに沿った断面形状が透明板
ガラス１２の内側へ向けて凸である場合には、欠陥部１
２Ａの有るガラス部１２Ｂは凹レンズ状になり、このガ
ラス部１２Ｂを通った光は拡散する。従って、欠陥部１
２Ａの投影像２０と他の部位とのコントラストを大きく
するためには、図１に示される如く、透明板ガラス１２
とスクリーン１６との間隔Ｌ2 は、短くすることが好ま
しい。As shown in FIG. 2, if the cross-sectional shape of the defective portion 12A of the transparent plate glass 12 along the optical axis P is convex toward the inside of the transparent plate glass 12, the defective portion 1
The glass portion 12B having 2A has a concave lens shape, and the light passing through the glass portion 12B is diffused. Therefore, the defective portion 1
In order to increase the contrast between the projected image 20 of 2A and other parts, as shown in FIG.
The distance L 2 between the screen 16 and the screen 16 is preferably short.
【００２７】一方、図３に示される如く、透明板ガラス
１２の欠陥部１２Ａの光軸Ｐに沿った断面形状が透明板
ガラス１２の外側へ向けて凸である場合には、欠陥部１
２Ａの有るガラス部１２Ｂは凸レンズ状になり、このガ
ラス部１２Ｂを通った光束は集光する。従って、欠陥部
１２Ａの投影像２０と他の部位とのコントラストを大き
くするためには、図１に示される如く、投影像２０の外
側に光束を集光させるように、透明板ガラス１２とスク
リーン１６との間隔Ｌ2 を長くすることが好ましい。On the other hand, as shown in FIG. 3, when the cross-sectional shape of the defective portion 12A of the transparent plate glass 12 along the optical axis P is convex toward the outside of the transparent plate glass 12, the defective portion 1 is formed.
The glass portion 12B having 2A has a convex lens shape, and the light flux passing through this glass portion 12B is condensed. Therefore, in order to increase the contrast between the projected image 20 of the defective portion 12A and other portions, as shown in FIG. 1, the transparent plate glass 12 and the screen 16 are arranged so that the light flux is condensed outside the projected image 20. It is preferable to lengthen the interval L 2 between and.
【００２８】即ち、透明板ガラス１２とスクリーン１６
との間隔Ｌ2 は欠陥部１２Ａの大きさと光の屈折角（焦
点距離）により求めることができる。That is, the transparent plate glass 12 and the screen 16
The distance L 2 between the distance and can be obtained from the size of the defective portion 12A and the refraction angle (focal length) of light.
【００２９】なお、本実施例では、スク−ン１６を挟ん
で透明板ガラス１２と反対側に撮影手段としてのカメラ
１８が配設したが、これに代えて、カメラ１８を設けな
いで目視にて観察しても良い。また、スク−ン１６の位
置に撮影手段としてのカメラ１８を配設しても良い。ス
ク−ン１６の位置にカメラ１８を配設した場合には、透
明板ガラス１２の欠陥部１２Ａがカメラ１８に直接投影
されるため、スク−ン１６による映像損失を低減でき
る。また、この場合には、透明板ガラス１２とカメラ１
８との間隔Ｌ2 は、カメラ１８のレンズを含め、カメラ
１８のスクーン部、即ち、フィルム、ＣＣＤ等に集光部
と投影像が重ならない値とする。In the present embodiment, the camera 18 as the photographing means is arranged on the side opposite to the transparent plate glass 12 with the screen 16 sandwiched between them, but instead of this, the camera 18 is not provided and is visually observed. You may observe. Further, a camera 18 as a photographing means may be arranged at the position of the screen 16. When the camera 18 is arranged at the position of the screen 16, the defective portion 12A of the transparent glass plate 12 is directly projected on the camera 18, so that the image loss due to the screen 16 can be reduced. Further, in this case, the transparent glass plate 12 and the camera 1
The distance L 2 from the projection lens 8 is set to a value such that the projection image does not overlap with the condensing part of the scoop part of the camera 18, that is, the film, CCD, etc., including the lens of the camera 18.
【００３０】また、本実施例では、被検査透明板状体を
透明板ガラスとしたが、被検査透明板状体は透明板ガラ
スには限定されず、光源の光を通し、スクリーン上に欠
陥部の投影像を形成できれば、樹脂板等の他の透明板状
体でも良い。Further, in this embodiment, the transparent plate-like body to be inspected is a transparent plate glass, but the transparent plate-like body to be inspected is not limited to the transparent plate glass, and the light from the light source is passed therethrough to form a defective portion on the screen. Other transparent plate-like members such as a resin plate may be used as long as they can form a projected image.
【００３１】[0031]
【発明の効果】請求項１〜請求項３に記載の本発明の透
明板状体の品質検査装置は、前記構成としたので、被検
査透明板状体の歪みや傷等の欠陥部の投影像の輪郭を明
確にすることができると共に、撮影手段で撮影する場合
にも撮影画像上で欠陥部の投影像の輪郭及び寸法に変化
が生じ難く測定精度が向上するという優れた効果を有す
る。The quality inspection device for a transparent plate according to the present invention as set forth in claims 1 to 3 has the above-mentioned structure. Therefore, a defect such as a distortion or a scratch on the transparent plate to be inspected is projected. This has an excellent effect that the contour of the image can be clarified, and the contour and size of the projected image of the defect portion hardly change on the photographed image even when the photograph is taken by the photographing means, and the measurement accuracy is improved.
【図１】本発明の一実施例の透明板状体の品質検査装置
を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing a quality inspection device for a transparent plate according to an embodiment of the present invention.
【図２】本発明の一実施例の透明板状体の品質検査装置
の作用説明図である。FIG. 2 is an operation explanatory view of the quality inspection device for a transparent plate according to the embodiment of the present invention.
【図３】本発明の一実施例の透明板状体の品質検査装置
の作用説明図である。FIG. 3 is an explanatory view of the operation of the quality inspection device for a transparent plate according to the embodiment of the present invention.
【図４】従来例の透明板状体の品質検査装置を示す概略
構成図である。FIG. 4 is a schematic configuration diagram showing a conventional transparent plate quality inspection device.
１０ 透明板状体の品質検査装置 １２ 透明板ガラス（被検査透明板状体） １４ 光源 １６ スク−ン １８ カメラ（撮影手段） 10 Quality inspection device for transparent plate 12 Transparent plate glass (transparent plate to be inspected) 14 Light source 16 Screen 18 Camera (imaging means)
Claims (3)
光源と、 前記被検査透明板状体を挟んで前記光源と反対側に配置
され前記被検査透明板状体を通った光を投影するための
半透明の膜から成るスクリーンと、 を有することを特徴とする透明板状体の品質検査装置。1. A light source for projecting parallel light rays onto a transparent plate to be inspected, and light passing through the transparent plate to be inspected, which is arranged on the opposite side of the light source with the transparent plate to be inspected interposed therebetween. And a screen made of a semitransparent film for projecting the light.
光源と、 前記被検査透明板状体を挟んで前記光源と反対側に配置
され前記被検査透明板状体を通った光を投影するための
半透明の膜から成るスクリーンと、 このスクリーンを挟んで前記被検査透明板状体と反対側
に配置され前記スクリーンに投影された前記被検査透明
板状体の欠陥部を撮影するための撮影手段と、 を有することを特徴とする透明板状体の品質検査装置。2. A light source for projecting parallel light rays onto a transparent plate to be inspected, and light passing through the transparent plate to be inspected, which is arranged on the opposite side of the light source with the transparent plate to be inspected interposed therebetween. A screen made of a semi-transparent film for projecting the image, and an image of the defective portion of the transparent plate to be inspected, which is arranged on the opposite side of the transparent plate to be inspected with the screen interposed therebetween and projected on the screen. A quality inspection device for a transparent plate, comprising:
光源と、 前記被検査透明板状体を挟んで前記光源と反対側に配置
され前記被検査透明板状体を通った光による投影像を直
接撮影するための撮影手段と、 を有することを特徴とする透明板状体の品質検査装置。3. A light source for projecting parallel light rays onto a transparent plate to be inspected, and light passing through the transparent plate to be inspected, which is arranged on the opposite side of the light source with the transparent plate to be inspected interposed therebetween. A quality inspection device for a transparent plate, comprising: a photographing means for directly photographing a projected image by the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10240495A JPH08297096A (en) | 1995-04-26 | 1995-04-26 | Quality inspecting apparatus for transparent platelike material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10240495A JPH08297096A (en) | 1995-04-26 | 1995-04-26 | Quality inspecting apparatus for transparent platelike material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08297096A true JPH08297096A (en) | 1996-11-12 |
Family
ID=14326511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10240495A Pending JPH08297096A (en) | 1995-04-26 | 1995-04-26 | Quality inspecting apparatus for transparent platelike material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08297096A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261948A (en) * | 2009-04-30 | 2010-11-18 | Corning Inc | Method and device for detecting defect in glass sheet |
| CN108508025A (en) * | 2018-04-04 | 2018-09-07 | 马鞍山启元自动化技术有限责任公司 | A kind of glass sample detection device and its detection method |
| JP2023008557A (en) * | 2021-07-06 | 2023-01-19 | 日本電気硝子株式会社 | Manufacturing method for glass and defect detection device |
| CN118896971A (en) * | 2024-08-19 | 2024-11-05 | 武汉精立电子技术有限公司 | Glass uniformity detection system and detection method |
-
1995
- 1995-04-26 JP JP10240495A patent/JPH08297096A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261948A (en) * | 2009-04-30 | 2010-11-18 | Corning Inc | Method and device for detecting defect in glass sheet |
| CN108508025A (en) * | 2018-04-04 | 2018-09-07 | 马鞍山启元自动化技术有限责任公司 | A kind of glass sample detection device and its detection method |
| JP2023008557A (en) * | 2021-07-06 | 2023-01-19 | 日本電気硝子株式会社 | Manufacturing method for glass and defect detection device |
| CN118896971A (en) * | 2024-08-19 | 2024-11-05 | 武汉精立电子技术有限公司 | Glass uniformity detection system and detection method |
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