JPH02217828A - Automatic exposure adjusting device - Google Patents
Automatic exposure adjusting deviceInfo
- Publication number
- JPH02217828A JPH02217828A JP1039066A JP3906689A JPH02217828A JP H02217828 A JPH02217828 A JP H02217828A JP 1039066 A JP1039066 A JP 1039066A JP 3906689 A JP3906689 A JP 3906689A JP H02217828 A JPH02217828 A JP H02217828A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- photometry
- photometric
- window
- cam frame
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000005375 photometry Methods 0.000 abstract description 21
- 238000005259 measurement Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Landscapes
- Exposure Control For Cameras (AREA)
- Structure And Mechanism Of Cameras (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、スチルカメラにおける外部測光手段を用いた
自動露出調整装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic exposure adjustment device using external photometry means in a still camera.
従来の技術
自動露出調整装置は一般に測光を行う手段と撮影用レン
ズの絞りを行う手段とシャッター手段および前記測光手
段によって、測定された被写体の輝度から計算により絞
りとシャッタースピードを決定する制御手段よりなって
いる。Conventional automatic exposure adjustment devices generally include a means for performing photometry, a means for adjusting the aperture of the photographic lens, a shutter means, and a control means for determining the aperture and shutter speed by calculation from the brightness of the subject measured by the photometering means. It has become.
第２図を用いて、従来の自動露出調整装置を説明する。A conventional automatic exposure adjustment device will be explained with reference to FIG.
第２図は測光素子と測光用レンズおよび測光用窓を具備
した自動露出調整装置における測光用素子の断面図であ
る。被写体の輝度分布は、測光用窓３により規制された
画角で測光用レンズ２を通して測光用素子１に与えられ
、この測光用素子１は前記輝度分布を電気信号に変換し
、この電気信号が自動露出調整装置の制御手段に送られ
絞りおよびシャッタースピードを計算するために用いら
れる。FIG. 2 is a cross-sectional view of a photometric element in an automatic exposure adjustment device equipped with a photometric element, a photometric lens, and a photometric window. The luminance distribution of the subject is given to the photometric element 1 through the photometric lens 2 at an angle of view regulated by the photometric window 3, and the photometric element 1 converts the luminance distribution into an electrical signal, and this electrical signal is It is sent to the control means of the automatic exposure adjustment device and used to calculate the aperture and shutter speed.
発明が解決しようとする課題
ここで、撮影用レンズがズームレンズ（あるいは多焦点
レンズ）の場合、前記測光素子において、たとえばズー
ムレンズの画角が最も小さいとき（望遠側）に測光素子
の画角を設定した場合、ズームレンズの画角が最も大き
いとき（広角側）には実際の測光分布が設定された測光
分布と大きく異なり、適正貫出が得られないという欠点
を有するものである。Problem to be Solved by the Invention Here, when the photographic lens is a zoom lens (or a multifocal lens), in the photometric element, for example, when the angle of view of the zoom lens is the smallest (telephoto side), the angle of view of the photometric element is When set, the actual photometric distribution differs greatly from the set photometric distribution when the angle of view of the zoom lens is the largest (wide-angle side), which has the disadvantage that appropriate penetration cannot be obtained.
また、画角の設定が逆の場合などについても、同様のこ
とが起こるものである。Furthermore, the same thing occurs when the angle of view is set in the opposite direction.
本発明は、上記問題を解決するもので、測光用窓を可変
梢遣とし、撮影用レンズの画角に連動して測光用窓によ
る測光用レンズの画角を規制するようにして自動露出調
整装置を提供することを目的とするものである。The present invention solves the above-mentioned problem, and the photometry window has a variable top cover, and the exposure is adjusted automatically by regulating the angle of view of the photometry lens using the photometry window in conjunction with the angle of view of the photographic lens. The purpose is to provide a device.
課題を解決するための手段
上記課題を解決するために、本発明の自動露出調整装置
は、撮影用レンズの画角変化に対応して測光用窓を回転
させる伝達手段と、前記伝達手段による測光用窓の回転
を測光用レンズの光軸方向への測光用窓の移動に変換す
る変換手段と、前記測光用レンズの物界側にあって前記
測光用窓と共働して測光用レンズの画角を規制する手段
とを備えたものである。Means for Solving the Problems In order to solve the above-mentioned problems, an automatic exposure adjustment device of the present invention includes a transmission means for rotating a photometry window in response to a change in the angle of view of a photographic lens, and a photometry method using the transmission means. a converting means for converting rotation of the photometric window into movement of the photometric window in the optical axis direction of the photometric lens; and means for regulating the angle of view.
作用
上記構成により、撮影用レンズのズーム位置に対応して
測光用窓は測光用レンズの光軸方向に移動し、測光素子
には撮影用レンズの全てのズーム位置において常に一定
の測光分布が得られ、姓適の露出を得ることができる。Effect With the above configuration, the photometry window moves in the direction of the optical axis of the photometry lens in response to the zoom position of the photography lens, and the photometry element always has a constant photometry distribution at all zoom positions of the photography lens. This allows you to gain exposure to your family name.
実施例 以下本発明の一実施例を図面に基づいて説明する。Example An embodiment of the present invention will be described below based on the drawings.
第１図は、本発明の一実施例である自動露出調整装置の
要部断面図である。第１図において、撮影用レンズ１１
は変倍時にズームリング１２の回転を伝達歯車１３を介
して測光用窓作動リング１４に伝え、この測光用窓作動
リング１４はカム枠１５にねじ止めされたカム枠作動ね
じ１６を駆動してカム枠１５を回転させ、このカム枠１
５のカム溝１５ａに係合しているカムローラ軸１７にね
じ止めされた測光用窓３はカム枠１５の回転により測光
用レンズ１の光軸方向に移動し、この移動によって撮影
用レンズ１１の画角に合せた測光用レンズ１の画角変化
が可能となり、被写体の輝度分布を撮影用レンズと同一
の測光分布によって測光することによって適正な露出が
可能となる。FIG. 1 is a sectional view of essential parts of an automatic exposure adjustment device that is an embodiment of the present invention. In FIG. 1, a photographic lens 11
During zooming, the rotation of the zoom ring 12 is transmitted via the transmission gear 13 to the photometric window operating ring 14, and this photometric window operating ring 14 drives a cam frame operating screw 16 screwed to the cam frame 15. By rotating the cam frame 15, this cam frame 1
The photometric window 3 screwed to the cam roller shaft 17 that engages with the cam groove 15a of the photometric lens 1 moves in the optical axis direction of the photometric lens 1 by the rotation of the cam frame 15, and this movement causes the photometric lens 11 to rotate. The angle of view of the photometric lens 1 can be changed to match the angle of view, and proper exposure can be achieved by measuring the brightness distribution of the subject using the same photometric distribution as that of the photographing lens.
すなわち、測光用レンズの画角は、この画角を規制する
手段としての、鏡胴１８のエツジ部１８ａと測光用窓３
の内周縁部３ａとの二点により構成される直線によって
決定されるため、カム枠１５に切られるカム溝１５ａを
撮影用レンズ１１の画角とズームリング１２の回転角よ
り計算されたカム曲線によってカム溝を製作することに
より実現できる。That is, the angle of view of the photometric lens is determined by the edge portion 18a of the lens barrel 18 and the photometric window 3, which serve as means for regulating the angle of view.
Since the cam groove 15a cut in the cam frame 15 is determined by the straight line formed by the two points with the inner circumferential edge 3a of This can be achieved by manufacturing a cam groove according to the following.
発明の効果
以上のように、本発明によれば、撮影用レンズの画角と
測光用レンズの画角を合致させることが可能となり、い
かなる画角においても被写体の輝度分布を忠実に測光素
子に与えることができ、最適な自動露出調整が得られる
。Effects of the Invention As described above, according to the present invention, it is possible to match the angle of view of the photographic lens and the angle of view of the photometric lens, and the brightness distribution of the subject can be faithfully reflected on the photometric element at any angle of view. The optimum automatic exposure adjustment can be obtained.
第１図は本発明の一実施例の自動露出調整装置の断面図
、第２図は従来の自動露出調整装置の断面図である。
１・・・測光素子、２・・・測光用レンズ、３・・・測
光用窓、３ａ・・・測光用窓内周縁部、１１・・・撮影
用レンズ、１２・・・ズームリング、１３・・・伝達歯
車、１４・・・測光用窓作動リング、１５・・・カム枠
、１５ａ・・・カム溝、１６・−・カム枠作動リング、
１７・・・カムローラ軸、１８・・・鏡胴、１８ａ・・
・エツジ部。
代理人 森 本 義 弘FIG. 1 is a sectional view of an automatic exposure adjustment device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional automatic exposure adjustment device. DESCRIPTION OF SYMBOLS 1... Photometering element, 2... Lens for photometry, 3... Window for photometry, 3a... Inner periphery of the window for photometry, 11... Lens for photography, 12... Zoom ring, 13 ...Transmission gear, 14...Photometering window operating ring, 15...Cam frame, 15a...Cam groove, 16...Cam frame operating ring,
17...Cam roller shaft, 18... Lens barrel, 18a...
・Etsuji Department. Agent Yoshihiro Morimoto
Claims (1)
ルカメラにおける自動露出調整装置であって、撮影用レ
ンズの画角変化に対応して前記測光用窓を回転させる伝
達手段と、前記伝達手段による測光用窓の回転を測光用
レンズの光軸方向への測光用窓の移動に変換する変換手
段と、前記測光用レンズの物界側にあつて前記測光用窓
と共働して測光用レンズの画角を規制する手段とを備え
た自動露出調整装置。1. An automatic exposure adjustment device for a still camera equipped with a photometric element, a photometric lens, and a photometric window, comprising a transmission means for rotating the photometric window in response to a change in the angle of view of the photographic lens; a conversion means for converting the rotation of the photometric window by the means into movement of the photometric window in the optical axis direction of the photometric lens; An automatic exposure adjustment device equipped with means for regulating the angle of view of a lens for use with a camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1039066A JPH02217828A (en) | 1989-02-18 | 1989-02-18 | Automatic exposure adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1039066A JPH02217828A (en) | 1989-02-18 | 1989-02-18 | Automatic exposure adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02217828A true JPH02217828A (en) | 1990-08-30 |
Family
ID=12542757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1039066A Pending JPH02217828A (en) | 1989-02-18 | 1989-02-18 | Automatic exposure adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02217828A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100307389A1 (en) * | 2009-06-05 | 2010-12-09 | Stewart Albert E | Reactor system and solid fuel composite therefor |
| CN107357338A (en) * | 2017-09-11 | 2017-11-17 | 中国科学院云南天文台 | A kind of optical element insulating box |
-
1989
- 1989-02-18 JP JP1039066A patent/JPH02217828A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100307389A1 (en) * | 2009-06-05 | 2010-12-09 | Stewart Albert E | Reactor system and solid fuel composite therefor |
| CN107357338A (en) * | 2017-09-11 | 2017-11-17 | 中国科学院云南天文台 | A kind of optical element insulating box |
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