JP2000250102A5 - - Google Patents

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Publication number
JP2000250102A5
JP2000250102A5 JP1999050704A JP5070499A JP2000250102A5 JP 2000250102 A5 JP2000250102 A5 JP 2000250102A5 JP 1999050704 A JP1999050704 A JP 1999050704A JP 5070499 A JP5070499 A JP 5070499A JP 2000250102 A5 JP2000250102 A5 JP 2000250102A5
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JP
Japan
Prior art keywords
incident surface
incident
light
shape
axis
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JP1999050704A
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Japanese (ja)
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JP2000250102A (en
JP4208325B2 (en
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Priority to JP05070499A priority Critical patent/JP4208325B2/en
Priority claimed from JP05070499A external-priority patent/JP4208325B2/en
Publication of JP2000250102A publication Critical patent/JP2000250102A/en
Publication of JP2000250102A5 publication Critical patent/JP2000250102A5/ja
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光学プリズム１１の被写体側の前面には、左右方向（Ｘ方向）の配光特性を制御するプリズム面１１ｄが形成されている。また、上下方向（Ｙ方向）の配光特性の制御は、主に照射光軸前方に射出された光束を入射させ屈折によって所望の配光特性に変換させる正面入射面１１aと、主に照射光軸に対して上下方向に射出された成分を入射させる上方入射面１１b、上方入射面１１bから入射した光束を全反射させる全反射面１１cによって行われている。形状に関しては後で詳しく説明する。 A prism surface 11d for controlling the light distribution characteristics in the left-right direction (X direction) is formed on the front surface of the optical prism 11 on the subject side. Further, the control of the light distribution characteristics in the vertical direction (Y direction) is mainly performed by the front incident surface 11a, which incidents a light beam emitted in front of the irradiation light axis and converts it into a desired light distribution characteristic by refraction, and mainly the irradiation light. is performed by the total reflection surface 11c for totally reflecting upper incident surface 11b for entering the injected components in the vertical direction, the light beam incident from the upper side incident surface 11b with respect to the axis. The shape will be described in detail later.

次に、光学プリズム１の全反射面１ｃに入射光を導く第２の入射面１ｂの形状を決定する。この第２の入射面１ｂの形状として、光学プリズムの形状を最小にするためには、光軸１Ｚと平行な平面であることが望ましい。 Next, to determine the shape of the second incident surface 1b for guiding incident light to the total reflection surface 1 c of the optical prism 1. The shape of the second incident surface 1b is preferably a plane parallel to the optical axis 1Z in order to minimize the shape of the optical prism.

また、入射面８ｂ，８ｂ′の角度φ、各入射面で制御後のそれぞれ射出最大角度の関係、さらに、入射面の境界線と光源中心とを結んだ線分と射出光軸となす角度θbdrとすると、本実施形態はそれぞれ以下の値をとった時の状態を示したものである。
φ＝０°｜β max ／α max ｜＝１．０ θ bdr ＝３８．６° Further, the angle φ of the incident surfaces 8b and 8b' , the relationship between the maximum injection angles after control at each incident surface, and the angle θ formed by the line segment connecting the boundary line of the incident surface and the center of the light source and the emission optical axis. Assuming bdr , this embodiment shows the state when the following values are taken.
φ = 0 ° | β max / α max | = 1.0 θ bdr = 38.6 °

JP05070499A 1999-02-26 1999-02-26 Illumination device and photographing device using the same Expired - Fee Related JP4208325B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05070499A JP4208325B2 (en) 1999-02-26 1999-02-26 Illumination device and photographing device using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05070499A JP4208325B2 (en) 1999-02-26 1999-02-26 Illumination device and photographing device using the same

Publications (3)

Publication Number Publication Date
JP2000250102A JP2000250102A (en) 2000-09-14
JP2000250102A5 true JP2000250102A5 (en) 2005-10-20
JP4208325B2 JP4208325B2 (en) 2009-01-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP05070499A Expired - Fee Related JP4208325B2 (en) 1999-02-26 1999-02-26 Illumination device and photographing device using the same

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JP (1) JP4208325B2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW525034B (en) * 2001-05-10 2003-03-21 Canon Kk Lighting apparatus and image pickup apparatus
JP4587429B2 (en) * 2001-07-06 2010-11-24 キヤノン株式会社 Illumination device and photographing device
JP4035502B2 (en) 2003-11-28 2008-01-23 キヤノン株式会社 Illumination optical system and photographing apparatus
JP4185856B2 (en) 2003-12-12 2008-11-26 キヤノン株式会社 Illumination device and imaging device
JP4366198B2 (en) 2004-01-23 2009-11-18 キヤノン株式会社 Illumination optics
JP2005284206A (en) * 2004-03-31 2005-10-13 Canon Inc Illumination device and photographing device
JP4612850B2 (en) 2005-03-10 2011-01-12 キヤノン株式会社 Illumination device and photographing device
CN103163572A (en) * 2011-12-08 2013-06-19 欧司朗股份有限公司 Lens, light emitting device and scanner
CN103775967B (en) * 2012-10-23 2018-05-11 欧司朗股份有限公司 Lens and LED modification lamps

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