JPH049913U - - Google Patents
Info
- Publication number
- JPH049913U JPH049913U JP5098290U JP5098290U JPH049913U JP H049913 U JPH049913 U JP H049913U JP 5098290 U JP5098290 U JP 5098290U JP 5098290 U JP5098290 U JP 5098290U JP H049913 U JPH049913 U JP H049913U
- Authority
- JP
- Japan
- Prior art keywords
- parallel
- prism
- beams
- shaped
- roof
- 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 description 9
- 230000004907 flux Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 1
Landscapes
- Focusing (AREA)
Description
第１図〜第４図はこの考案の一実施例を示し、
第１図はズームレンズのオートフオーカス系を示
す基本構成図、第２図は光軸と平行な平行光線と
光軸に対して上側に角度を有する平行光線との結
像状態を示す図、第３図は光軸と平行な平行光線
と光軸に対して下側に角度を有する平行光線との
結像状態を示す図、第４図は光軸と平行な平行光
線と光軸上の近距離にある物点からの発散光線と
の結像状態を示す図である。
３……プリズム系、４……屋根型プリズム、５
……谷型プリズム、６……セパレータレンズ部、
７……結像面、Ｐ１〜Ｐ６……像点。
Figures 1 to 4 show an embodiment of this invention,
Fig. 1 is a basic configuration diagram showing the autofocus system of a zoom lens, Fig. 2 is a diagram showing the image formation state of parallel rays parallel to the optical axis and parallel rays having an angle upward with respect to the optical axis. Figure 3 is a diagram showing the imaging state of parallel rays parallel to the optical axis and parallel rays having an angle downward with respect to the optical axis, and Figure 4 is a diagram showing the image formation state of parallel rays parallel to the optical axis and parallel rays on the optical axis. FIG. 3 is a diagram showing a state of image formation with diverging light rays from an object point located at a short distance. 3... Prism type, 4... Roof type prism, 5
... Valley prism, 6 ... Separator lens section,
7...Image plane, P1 to P6 ...Image points.
Claims (1)
像間距離を測定することにより焦点距離を検出す
る自動焦点機構用光学系において、 アフオーカル部から取り出した入射光線束を２
つの光線束に分割し、この分割した２つの光線束
を前記入射光線束と平行な２つの平行光線束とし
て射出するプリズム系と、 このプリズム系を通過した２つの平行光線束を
それぞれ同一平面上に２つの像として結像させる
セパレータレンズ部と、 を具備してなる自動焦点機構用光学系。 (2) 請求項第１項において、前記プリズム系は
、入射光線束を２つの光線束に分割する屋根型の
射出面を有する屋根型プリズムと、この屋根型プ
リズムで分割した２つの光線束を前記入射光線束
と平行な２つの平行光線束として射出する谷型の
入射面を有する谷型プリズムとで構成されている
ことを特徴とする自動焦点機構用光学系。[Claims for Utility Model Registration] (1) In an optical system for an automatic focusing mechanism that detects the focal length by forming two images on the same plane and measuring the distance between the images, The incident ray flux is 2
A prism system that divides the two divided ray bundles into two parallel ray bundles and emits the two divided ray bundles as two parallel ray bundles parallel to the incident ray bundle; An optical system for an automatic focusing mechanism, comprising: a separator lens portion that forms two images on the image plane; (2) In claim 1, the prism system includes a roof-shaped prism having a roof-shaped exit surface that divides an incident beam into two beams, and a roof-shaped prism that divides the two beams into two beams. 1. An optical system for an automatic focusing mechanism, comprising: a valley-shaped prism having a valley-shaped entrance surface that emits two parallel light beams parallel to the incident light beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5098290U JPH049913U (en) | 1990-05-16 | 1990-05-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5098290U JPH049913U (en) | 1990-05-16 | 1990-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH049913U true JPH049913U (en) | 1992-01-28 |
Family
ID=31570005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5098290U Pending JPH049913U (en) | 1990-05-16 | 1990-05-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH049913U (en) |
-
1990
- 1990-05-16 JP JP5098290U patent/JPH049913U/ja active Pending
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