JPH0175210U - - Google Patents
Info
- Publication number
- JPH0175210U JPH0175210U JP1987170646U JP17064687U JPH0175210U JP H0175210 U JPH0175210 U JP H0175210U JP 1987170646 U JP1987170646 U JP 1987170646U JP 17064687 U JP17064687 U JP 17064687U JP H0175210 U JPH0175210 U JP H0175210U
- Authority
- JP
- Japan
- Prior art keywords
- distance
- light
- subject
- optical axis
- light source
- 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
- 230000003287 optical effect Effects 0.000 claims 4
- 238000001514 detection method Methods 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
Landscapes
- Focusing (AREA)
Description
第１図〜第３図は、いずれも本考案に係る測距
用補助光投射装置の一実施例の構成を示し、この
うち、第１図は、従来の自動焦点カメラに適用し
た場合の構成を示す縦断側面図、第２図は、要部
の構成を示す側面図、第３図は、同実施例の作用
を説明するための側面図、第４図は、従来例を示
す縦断側面図である。
１……光源、２……パターンマスク、３……コ
ンデンサレンズ、４……投影レンズ部、４ａ，４
ｂ……投影レンズ、５ａ……遠距離用補助光、５
ｂ……近距離用補助光、６……被写体、６ａ……
遠距離の被写体、６ｂ……近距離の被写体、７…
…測距可能範囲、８……自動焦点カメラ、９……
撮影レンズ部、１０……補助光投射装置、１１…
…虚像、１２……明暗パターン、１２ａ……遠距
離の明暗パターン、１２ｂ……近距離の明暗パタ
ーン。
Figures 1 to 3 all show the configuration of an embodiment of the distance measuring auxiliary light projection device according to the present invention, of which Figure 1 shows the configuration when applied to a conventional autofocus camera. FIG. 2 is a side view showing the configuration of the main parts, FIG. 3 is a side view illustrating the operation of the embodiment, and FIG. 4 is a longitudinal side view showing the conventional example. It is. 1... Light source, 2... Pattern mask, 3... Condenser lens, 4... Projection lens section, 4a, 4
b... Projection lens, 5a... Long-distance auxiliary light, 5
b... Short-distance auxiliary light, 6... Subject, 6a...
A long-distance subject, 6b...A close-range subject, 7...
...Measurable range, 8...Auto-focus camera, 9...
Photographing lens section, 10...Auxiliary light projection device, 11...
...Virtual image, 12... Light and dark pattern, 12a... Long distance light and dark pattern, 12b... Short distance light and dark pattern.
Claims (1)
式を用いた自動焦点カメラの測距精度を維持する
ために複数に分割された光束から成る補助光を被
写体に投射し、上記分割に対応する明暗パターン
を被写体面上に形成する測距用補助光投射装置に
おいて、光軸上に配設された１つの光源と、この
光源からの光を透過させる部分および遮光する部
分が所定の形状で組合わされて成り上記明暗パタ
ーンを形成するために該光源の前方の上記光軸上
に配設された１つの投影マスクと、上記光軸上に
配設され上記光源に照明された上記投影マスクの
虚像を作るコンデンサレンズと、このコンデンサ
レンズの前方に上記光軸を挟んでそれぞれ配設さ
れ上記虚像を上記被写体に投影する少なくとも２
つ以上の投影レンズとを具備し、上記カメラに対
して比較的遠距離および近距離にそれぞれ位置す
る上記被写体の測距が可能な遠距離測距可能範囲
および近距離測距可能範囲のそれぞれの範囲内に
少なくとも１つ以上の上記明暗パターンを形成し
得るように構成したことを特徴とする測距用補助
光投射装置。 In order to maintain the distance measurement accuracy of an autofocus camera using a phase difference detection method when the subject brightness is low, fill-in light consisting of a luminous flux divided into multiple parts is projected onto the subject, and a brightness pattern corresponding to the above divisions is created. A distance measuring auxiliary light projection device formed on the subject surface consists of one light source disposed on the optical axis, a part that transmits light from this light source, and a part that blocks light, combined in a predetermined shape. a projection mask disposed on the optical axis in front of the light source to form the light-dark pattern; and a condenser for creating a virtual image of the projection mask disposed on the optical axis and illuminated by the light source. a lens, and at least two lenses each disposed in front of the condenser lens across the optical axis and projecting the virtual image onto the subject.
each of a long-distance measurable range and a short-distance measurable range capable of measuring the distance of the subject located at a relatively long distance and a short distance from the camera, respectively. An auxiliary light projection device for ranging, characterized in that it is configured to be able to form at least one or more of the above bright and dark patterns within a range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170646U JPH0175210U (en) | 1987-11-10 | 1987-11-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170646U JPH0175210U (en) | 1987-11-10 | 1987-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0175210U true JPH0175210U (en) | 1989-05-22 |
Family
ID=31461770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987170646U Pending JPH0175210U (en) | 1987-11-10 | 1987-11-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0175210U (en) |
-
1987
- 1987-11-10 JP JP1987170646U patent/JPH0175210U/ja active Pending
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