JPS5898618U - camera photometry device - Google Patents
camera photometry deviceInfo
- Publication number
- JPS5898618U JPS5898618U JP1981198223U JP19822381U JPS5898618U JP S5898618 U JPS5898618 U JP S5898618U JP 1981198223 U JP1981198223 U JP 1981198223U JP 19822381 U JP19822381 U JP 19822381U JP S5898618 U JPS5898618 U JP S5898618U
- Authority
- JP
- Japan
- Prior art keywords
- light
- photometric
- reflector
- photometry
- camera
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、従来のカメラの測光装置の一例を示す概略断
面図、第２図は、従来のカメラの測光装置の他の例を示
すカメラの測光装置の断面図、第３図Ａは、上記第２図
のカメラの測光装置におけ。
、る測光用反射鏡の正面図、第３図Ｂは、上記第２図の
カメラの測光装置における受光部の拡大正面図、第４図
は、本考案の一実施例を示すカメラの測光装置の要部断
面図、第５図は、上記第４図のカメラの測光装置の測光
用反射鏡のフレネル面の斜視図、第６図は、上記第４図
のカメラの測光装置の使用態様を示す断面図、第７図は
、上記第４図のカメラの測光装置における受光部の拡大
断面図、第８． ９． １０図は、本考案のカメラの測
光装置における測光用反射鏡の成形型の製作工程を夫々
示す斜視図、第１１図は、本考案のカメラの測光装置に
おける測光用反射鏡の他の例を示す要部正面図である。
２２・・・・・・観察用可動反射鏡、２６．３３・・・
・・・測光用反射鏡、２９・・・・・・撮影レンズ、３
０・・・・・・受光部、３０ａ、３０ｂ、３０Ｃ・・・
・・・測光用受光素子、３１、 ３１ａ、 ３１’ｂ
、 ３１Ｃ−−−−−−集光レンズ、３２・・・・・
・射出瞳、３３ａ・・・・・・フレネル面。FIG. 1 is a schematic sectional view showing an example of a conventional camera photometry device, FIG. 2 is a sectional view of a camera photometry device showing another example of a conventional camera photometry device, and FIG. In the photometry device of the camera shown in FIG. 2 above. FIG. 3B is an enlarged front view of the light-receiving section of the camera photometer shown in FIG. 2, and FIG. 4 is a front view of the photometering reflector shown in FIG. 5 is a perspective view of the Fresnel surface of the photometric reflector of the photometric device of the camera shown in FIG. 4, and FIG. 6 shows how the photometric device of the camera shown in FIG. 4 is used. The sectional view shown in FIG. 7 is an enlarged sectional view of the light receiving section in the photometry device of the camera shown in FIG. 9. FIG. 10 is a perspective view showing the manufacturing process of the mold for the photometric reflector in the camera photometry device of the present invention, and FIG. 11 is a perspective view showing another example of the photometry reflector in the camera photometer of the present invention. FIG. 22...Movable reflecting mirror for observation, 26.33...
...Reflector for photometry, 29...Photographing lens, 3
0... Light receiving section, 30a, 30b, 30C...
...Photometric light receiving element, 31, 31a, 31'b
, 31C------ Condensing lens, 32...
・Exit pupil, 33a...Fresnel surface.
Claims (3)
光用反射鏡と、 この測光用反射鏡の下方に配設されていて、同反射鏡に
より反射された全被写体を受光する測光用受光素子及び
主として被写体光の中央部分を受光する測光用受光素子
とからなる受光部と、上記測光用反射鏡からの反射光を
上記受光部に向けて集光する集光レンズとを具備するＴ
ＴＬ測光式−眼レフレックスカメラにおいて、上記測光
用反射鏡の少くとも中央部反射面は、撮影レンズの射出
瞳の一端方向からの入射光を優先して、上記集光レンズ
を介して上記受光部に導くようにした反射角の異なる多
数の反射面で形成されていることを特徴とするカメラの
測光装置。(1) A photometric reflector placed behind the movable semi-transparent observation mirror, and a photometric reflector placed below the photometric reflector to receive light from all objects reflected by the photometric reflector. a light-receiving section consisting of a light-receiving element for photometry and a light-receiving element for photometry that mainly receives the central part of the subject light, and a condensing lens that focuses the reflected light from the photometry reflector toward the light-receiving section. Equipped with T
In the TL photometry-type eye reflex camera, at least the central reflecting surface of the photometry reflector prioritizes incident light from one end of the exit pupil of the photographic lens and receives the light through the condenser lens. 1. A photometric device for a camera, characterized in that it is formed of a large number of reflective surfaces with different reflection angles, each of which guides the light toward the center of the camera.
被写体光の測光分布の中央重点度が高く、その周辺部が
低くなるように形成されていることを特徴とする実用新
案登録請求の範囲第１項記載のカメラの測光装置。(2) The reflective surface of the photometric reflector has a central part that is
A photometric device for a camera according to claim 1, wherein the photometric distribution of subject light is formed so that the center weight is high and the peripheral weight is low.
上下に階段状に並列するフレネル面で構成、されている
ことを特徴とする実用新案登録請求の範囲第１項記載の
カメラの測光装置。(3) At least the central reflective surface of the photometric reflector is
A photometric device for a camera according to claim 1, characterized in that it is constituted by Fresnel surfaces arranged vertically in a stepwise manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981198223U JPS5898618U (en) | 1981-12-25 | 1981-12-25 | camera photometry device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981198223U JPS5898618U (en) | 1981-12-25 | 1981-12-25 | camera photometry device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5898618U true JPS5898618U (en) | 1983-07-05 |
Family
ID=30111414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981198223U Pending JPS5898618U (en) | 1981-12-25 | 1981-12-25 | camera photometry device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5898618U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5231736A (en) * | 1975-09-05 | 1977-03-10 | Nippon Kogaku Kk <Nikon> | Ttl light measure device for single lens reflex camera |
| JPS5240133A (en) * | 1975-09-26 | 1977-03-28 | Minolta Camera Co Ltd | Ttl light measure type exposure control device |
-
1981
- 1981-12-25 JP JP1981198223U patent/JPS5898618U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5231736A (en) * | 1975-09-05 | 1977-03-10 | Nippon Kogaku Kk <Nikon> | Ttl light measure device for single lens reflex camera |
| JPS5240133A (en) * | 1975-09-26 | 1977-03-28 | Minolta Camera Co Ltd | Ttl light measure type exposure control device |
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