JPH03223831A - Light projecting device for camera - Google Patents
Light projecting device for cameraInfo
- Publication number
- JPH03223831A JPH03223831A JP1972390A JP1972390A JPH03223831A JP H03223831 A JPH03223831 A JP H03223831A JP 1972390 A JP1972390 A JP 1972390A JP 1972390 A JP1972390 A JP 1972390A JP H03223831 A JPH03223831 A JP H03223831A
- Authority
- JP
- Japan
- Prior art keywords
- led
- light projecting
- supports
- light
- support member
- 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
- 230000004907 flux Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 13
- 230000003287 optical effect Effects 0.000 description 3
- 230000011514 reflex Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、特に、焦点検出に供されるカメラ用の投光装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention particularly relates to a light projection device for a camera that is used for focus detection.
〔従来の技術]
従来より被写体輝度が低い場合そして殊にコントラスト
が小さい場合、受動型の焦点検出装置では正確な検出は
困難になるため所定パターンを投光することが行われて
いる。この種の投光装置の構成要素を組立てる際、これ
までは部品精度の範囲内で取付は作業を行っていたわけ
であるが、そうすると余裕のある大きさのパターンを投
影するために光源エネルギーに無駄があったり、部品精
度を高めておくとコストアップになる不具合があった。[Prior Art] Conventionally, when the subject brightness is low and especially when the contrast is small, accurate detection becomes difficult with a passive focus detection device, so light is projected in a predetermined pattern. Until now, when assembling the components of this type of projector, the installation work was done within the precision of the parts, but in this case, the light source energy was wasted in order to project a pattern of a size that could be afforded. There were also problems that would increase costs if the precision of parts was improved.
一方、これまでのカメラは検出区域が画面の中央に限ら
れていたが、−眼レフカメラでは画面の異った部位に位
置する被写体に対しそれぞれ焦点検出を行うことが求め
られており、複数の検出センサを備えた焦点検出装置が
カメラに組込まれる様になってきている。On the other hand, with conventional cameras, the detection area was limited to the center of the screen, but with eye reflex cameras, it is required to perform focus detection for subjects located in different parts of the screen. Focus detection devices equipped with detection sensors have come to be incorporated into cameras.
その場合、投影パターンをいずれの検出センサも良好に
受像する様になっている必要があるため、従来に比して
高い精度で装置が出来上がっている必要がある。In this case, since it is necessary that the projected pattern is received well by each detection sensor, the apparatus needs to be manufactured with higher precision than in the past.
[発明が解決しようとしている課題]
本発明は上述の無駄を解消し、あるいは高精度の調整を
可能にすることを課題とする。[Problems to be Solved by the Invention] An object of the present invention is to eliminate the above-mentioned waste or to enable highly accurate adjustment.
〔課題を解決するための手段]
本発明は、光源となるLEDと、該LEDの放射光を物
体に導くための投光レンズと、該投光レンズと前記LE
Dとを支持する支持部材と、該支持部材を固定する基体
とを有するカメラの投光装置において、前記支持部材は
前記LEDを支持する第1の支持部と、前記投光レンズ
を支持する第2の支持部とを有し、該第1の支持部と該
第2の支持部とは可撓性を有する連結腕を介して結合さ
れ、該アーム部の撓みに伴って、前記パターンと前記投
光レンズとの相対距離が変化するように構成したことに
より、極めて簡単な構成で、投影パターンのピント調整
を可能としたものである。[Means for Solving the Problems] The present invention provides an LED serving as a light source, a light projection lens for guiding emitted light from the LED to an object, and a combination of the light projection lens and the LED.
D, and a base body to which the support member is fixed. The first support part and the second support part are connected via a flexible connecting arm, and as the arm part bends, the pattern and the second support part are connected. By configuring it so that the relative distance to the projection lens changes, it is possible to adjust the focus of the projection pattern with an extremely simple configuration.
[実施例]
第1図〜第7図は本発明による実施例であり、第1図は
一眼レフカメラに本投光装置を組込んだ場合の一形態を
示す断面図である0図中1はカメラ本体、2は結像レン
ズ3をその光軸方向に移動可能に保持するレンズ鏡筒、
4は被写体光を焦点検出装置5とファインダー系へ分割
するハーフミラ−6はピント板でペンタプリズム7、接
眼レンズ8と共にファインダー系を構成する。9はハー
フミラ−4を透過した光束を周知の複数の箇所の検出可
能焦点検出装置5へ導くためのサブミラーである。10
はLEDで発光源の保護と光線の指向方向を調整するド
ーム11、投光レンズ12と共に焦点検出用の補助光投
光系を構成する。13はLEDのパッケージである。補
助光投光系は後述のワークによりユニット化され、例え
ばカメラ本体に組込まれる。[Example] Figures 1 to 7 show examples according to the present invention, and Figure 1 is a cross-sectional view showing an embodiment of the present projector incorporated into a single-lens reflex camera. 2 is a camera body; 2 is a lens barrel that holds the imaging lens 3 movably in the direction of its optical axis;
Reference numeral 4 denotes a half mirror 6 which divides the subject light into a focus detection device 5 and a finder system. A half mirror 6 is a focusing plate and together with a pentaprism 7 and an eyepiece 8 constitutes a finder system. Reference numeral 9 denotes a submirror for guiding the light beam transmitted through the half mirror 4 to a known focus detection device 5 at a plurality of locations. 10
constitutes an auxiliary light projecting system for focus detection together with a dome 11 and a projecting lens 12, which protect the light emitting source using LEDs and adjust the directing direction of the light beam. 13 is an LED package. The auxiliary light projecting system is made into a unit by a work described below, and is incorporated into, for example, a camera body.
LEDIOは第2図に斜線で示したような発光部形状を
有しており、このパターンが被写体に投影され、焦点検
出のための被写体情報となる。The LEDIO has a light emitting part shape as shown by diagonal lines in FIG. 2, and this pattern is projected onto the subject and becomes subject information for focus detection.
第3図〜第5図は補助光投光ユニットの詳細図であって
、第3図は構成要素の斜視図、第4図は組立状態の斜視
図である。図において、14は支持部材で、LEDIO
パッケージ13、ドーム11および投光レンズ12を支
持する。15は調整用ビスで支持部材11の位置調整に
使われるものである。ドーム11には支持部材14に接
する面にビンllc、Ildが設けられ、支持部材14
の位置決め穴14c、同斜め長穴14dに貫通し支持さ
れる。一方、このドームに対して、LEDのパッケージ
13が光軸゛を合わせて透明接着剤にて固着されている
ものとする。3 to 5 are detailed views of the auxiliary light projection unit, with FIG. 3 being a perspective view of the components, and FIG. 4 being a perspective view of the assembled state. In the figure, 14 is a support member, and the LEDIO
It supports the package 13, dome 11 and light projecting lens 12. Numeral 15 is an adjustment screw used for adjusting the position of the support member 11. The dome 11 is provided with bottles llc and Ild on the surface that is in contact with the support member 14, and the support member 14
It penetrates and is supported by the positioning hole 14c and the oblique elongated hole 14d. On the other hand, it is assumed that an LED package 13 is fixed to this dome with a transparent adhesive with its optical axis aligned.
14a、14bは可撓性連結腕で、支持部材の前部14
Fと後部14Rを連結している。投光レンズ12はユニ
ットの組立途中にあってはその翼部12e、12fの取
付面が組立治具によって、支持部材14の固定用柱体1
4e、14fの取付面に対して平面同志で圧接されてお
り、LEDlOより発した光束が、この投光レンズを介
して、焦点検出装置5の測距視野内にある調整用被写体
上に到達するよう光軸の偏心調整が矢印A。14a, 14b are flexible connecting arms, which connect the front part 14 of the support member.
Connects F and rear 14R. During assembly of the projector lens 12, the mounting surfaces of its wing parts 12e and 12f are attached to the fixing column 1 of the support member 14 by an assembly jig.
They are pressed against the mounting surfaces of 4e and 14f on a plane-to-plane basis, and the light flux emitted from the LEDlO reaches the adjustment subject within the distance measurement field of the focus detection device 5 via this projection lens. Arrow A indicates eccentric adjustment of the optical axis.
B方向について行われ、調整終了後、固定用柱体14e
、14fと翼部12e、12fとの間で接着剤を使って
接着が行われる。12g、12hはこの偏心調整に使わ
れる治具保持用の調整孔である。After the adjustment is completed in the B direction, the fixing column 14e
, 14f and the wing portions 12e, 12f are bonded using adhesive. 12g and 12h are adjustment holes for holding a jig used for this eccentric adjustment.
第5図は投光ユニットがカメラ本体の基体16に対して
固定された状態を示す断面図である。FIG. 5 is a sectional view showing a state in which the light projection unit is fixed to the base 16 of the camera body.
基体16にはスライドガイド部16k、固定ビン16j
およびネジ穴16βが設けられており、支持部材14の
固定穴14jに固定ビ16jが圧入され、さらに支持部
材14のガイド溝14kにスライドガイド部16kが摺
動可能に嵌合している。また、UfJ整ビス15は支持
部材14の底部を挟み込んで基体16と螺合している。The base body 16 includes a slide guide portion 16k and a fixed bottle 16j.
A fixing screw 16j is press-fitted into the fixing hole 14j of the support member 14, and a slide guide portion 16k is slidably fitted into the guide groove 14k of the support member 14. Further, the UfJ screw 15 is screwed into the base 16 with the bottom of the support member 14 sandwiched therebetween.
支持部材14には調整ビス15の頭部15iと接する斜
面14iが設けられており、調整ビス15の回転による
進退に伴ってLEDIO、ドーム11を矢印C方向に移
動させるような分力を発生している。The support member 14 is provided with a slope 14i that contacts the head 15i of the adjustment screw 15, and generates a component force that moves the LEDIO and dome 11 in the direction of arrow C as the adjustment screw 15 moves forward and backward by rotation. ing.
第6図および第7図を用いて矢印C方向に加わる力を利
用した投影パターンのピント調整について説明する。第
6図、第7図は投光ユニットを上方より見た平面図であ
り、第6図は調整ビス15が第5図に示した位置の場合
、第7図は調整ビスがさらにねじ込まれた場合をそれぞ
れ示している。支持部材14の連結腕14a、14bは
可撓性を有し、LEDIOを支持した支持部材の後部と
、投光レンズを支持した前部の近接・離間を可能にして
いる。従って、調整ビス15のねじ込みによって支持部
材の斜面14iが押しのけられるような力が発生すると
、この連結腕14a、14bが撓んで、LEDの位置が
後方に移動する。すなわち、第7図における投光レンズ
12とLEDloとの距離は、第6図における投光レン
ズ12とLED 10との距離に比べ大きくなっている
。Focus adjustment of a projection pattern using a force applied in the direction of arrow C will be described with reference to FIGS. 6 and 7. Figures 6 and 7 are plan views of the light projecting unit viewed from above. Figure 6 shows the adjustment screw 15 in the position shown in Figure 5, and Figure 7 shows the adjustment screw 15 screwed in further. Each case is shown. The connecting arms 14a and 14b of the support member 14 are flexible, and enable the rear part of the support member that supports the LEDIO to be brought close to or separated from the front part that supports the projecting lens. Therefore, when a force is generated that pushes away the slope 14i of the support member by screwing in the adjustment screw 15, the connecting arms 14a and 14b are bent, and the position of the LED is moved rearward. That is, the distance between the light projecting lens 12 and the LEDlo in FIG. 7 is larger than the distance between the light projecting lens 12 and the LED 10 in FIG.
このように、各部品の製造誤差によって発生する投影パ
ターンのピントズレは、ピント位置をモニタしながら調
整ビス15を進退させることで補正することが可能であ
る。In this way, the out-of-focus of the projection pattern caused by manufacturing errors of each component can be corrected by moving the adjustment screw 15 forward and backward while monitoring the focus position.
以上のように、投光レンズ12の平行偏芯で投光方向の
調整を、LEDの前後移動で投影パターン像のピント調
整を行っているため、この2つの調整は独立に行うこと
が可能であり、極めて組立作業性が良い。As described above, since the direction of light projection is adjusted by the parallel eccentricity of the light projection lens 12, and the focus of the projected pattern image is adjusted by moving the LED back and forth, these two adjustments can be performed independently. Yes, it is extremely easy to assemble.
尚、基体16はカメラ本体に着脱自在のケージングでも
良い、又、上側では支持体の前部が基体に対して固定で
あるが、後部が固定でも良い、パターンは別途ネガフィ
ルムに設け、これを照明する様にしても良い。The base 16 may be a cage that is detachable from the camera body, and the front part of the support is fixed to the base on the upper side, but the rear part may also be fixed.The pattern is provided separately on a negative film, and this is It may also be illuminated.
[発明の効果)
支持部材は投光レンズを支持する第1の支持部と、LE
Dを支持する第2の支持部とを有し、該第1の支持部と
該第2の支持部とは可撓弾性を有する連結腕を介して結
合され、該撓みに伴って、前記パターンと前記投光レン
ズとの相対距離が変化するように構成したことにより、
(1)極めて簡単な構成で投影パターンのピント調整が
可能となる。[Effect of the invention] The support member includes a first support portion that supports the light projecting lens, and an LE
A second support part that supports D, the first support part and the second support part are connected via a flexible connecting arm, and as the pattern is bent, the pattern By configuring so that the relative distance between the projection lens and the projection lens changes, (1) focus adjustment of the projection pattern becomes possible with an extremely simple configuration.
(2)部品点数が少ないため安価である。(2) It is inexpensive because it has a small number of parts.
と云う効果がある。There is an effect called.
第1図は本発明による投光装置を一眼レフカメラに組込
んだ例を示す断面図、
第2図はLEDの発光部形状を示す説明図、第3図およ
び第4図は投光装置の斜視図、第5図は投光装置の断面
図、
第6図および第7図は夫々投光装置の上面図である。
図中、10はLED、12は投光レンズ、14は支持部
材、14a、14bは連結腕、16は基体。
74k
tη
第6図
12
、t
3Fig. 1 is a sectional view showing an example in which a light projecting device according to the present invention is incorporated into a single-lens reflex camera, Fig. 2 is an explanatory diagram showing the shape of the light emitting part of an LED, and Figs. 3 and 4 are views of the projecting device. A perspective view, FIG. 5 is a sectional view of the light projecting device, and FIGS. 6 and 7 are top views of the light projecting device. In the figure, 10 is an LED, 12 is a light projection lens, 14 is a support member, 14a, 14b are connecting arms, and 16 is a base. 74k tη Figure 6 12, t 3
Claims (1)
くための投光レンズと、該投光レンズと前記LEDとを
支持する支持部材と、該支持部材を固定する基体とを有
するカメラの投光装置において、 前記支持部材は前記LEDを支持する第1の支持部と、
前記投光レンズを支持する第2の支持部とを有し、該第
1の支持部と該第2の支持部とは可撓性を有する連結腕
を介して結合され、該連結腕の撓みに伴って、前記LE
Dと前記投光レンズとの相対距離が変化するように構成
したことを特徴とするカメラの投光装置。[Scope of Claims] An LED serving as a light source, a projection lens for guiding the emitted light flux of the LED to a subject, a support member that supports the projection lens and the LED, and a base that fixes the support member. In the camera light projection device, the support member includes a first support portion that supports the LED;
a second support part that supports the light projecting lens, the first support part and the second support part are connected via a flexible connecting arm, and the bending of the connecting arm Accordingly, the LE
A light projecting device for a camera, characterized in that the relative distance between D and the light projecting lens is configured to change.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1972390A JPH03223831A (en) | 1990-01-30 | 1990-01-30 | Light projecting device for camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1972390A JPH03223831A (en) | 1990-01-30 | 1990-01-30 | Light projecting device for camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03223831A true JPH03223831A (en) | 1991-10-02 |
Family
ID=12007227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1972390A Pending JPH03223831A (en) | 1990-01-30 | 1990-01-30 | Light projecting device for camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03223831A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19721112B4 (en) * | 1996-05-20 | 2010-12-02 | Mitutoyo Corp., Kawasaki-shi | autofocusing |
-
1990
- 1990-01-30 JP JP1972390A patent/JPH03223831A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19721112B4 (en) * | 1996-05-20 | 2010-12-02 | Mitutoyo Corp., Kawasaki-shi | autofocusing |
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