JPH0320323U - - Google Patents
Info
- Publication number
- JPH0320323U JPH0320323U JP8025989U JP8025989U JPH0320323U JP H0320323 U JPH0320323 U JP H0320323U JP 8025989 U JP8025989 U JP 8025989U JP 8025989 U JP8025989 U JP 8025989U JP H0320323 U JPH0320323 U JP H0320323U
- Authority
- JP
- Japan
- Prior art keywords
- focus detection
- detection member
- focal
- axis direction
- optical axis
- 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
- 238000001514 detection method Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000011514 reflex Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 1
Description
図面は、この考案に係る合焦検出装置の好まし
い一実施例を示すものである。第１図はこの合焦
検出装置を備えた一眼レフカメラにおける光路と
光学系の概略を示す側面図である。第２図は、こ
の考案の要部を示した側面図である。第３図は同
じく要部を示すもので、フアインダーの視野図で
ある。第４図は、一眼レフカメラのレンズ繰り出
し量とボケとの概略の関係を説明するための線図
である。第５図および第６図は焦点検出部材の他
の実施例を示すもので、第５図は第２図に相当す
る要部を示した側面図であり、第６図は第３図に
相当するフアインダーの視野図である。
２……撮影レンズ、４……クリツクリターンミ
ラー、６……フイルム面、８……焦点検出部材、
８ａ，８ｂ，８ｃ……焦点板、８１，８２，８３
……焦点部、９……焦点検出部、９１，９２，９
３……焦点部、１０……フレネルレンズ、１１…
…フレネルレンズ部、１２……ペンタプリズム、
１４……接眼レンズ。
The drawings show a preferred embodiment of the focus detection device according to the invention. FIG. 1 is a side view schematically showing the optical path and optical system of a single-lens reflex camera equipped with this focus detection device. FIG. 2 is a side view showing the main parts of this invention. FIG. 3 similarly shows the main parts and is a field view of the finder. FIG. 4 is a diagram for explaining the general relationship between the lens extension amount and blur of a single-lens reflex camera. 5 and 6 show other embodiments of the focus detection member, FIG. 5 is a side view showing the main parts corresponding to FIG. 2, and FIG. 6 is a side view corresponding to FIG. 3. FIG. 2... Photographing lens, 4... Click return mirror, 6... Film surface, 8... Focus detection member,
8a, 8b, 8c... focus plate, 81, 82, 83
... Focus section, 9... Focus detection section, 91, 92, 9
3... Focal point, 10... Fresnel lens, 11...
...Fresnel lens section, 12...Penta prism,
14...Eyepiece.
Claims (1)
を光路内に設け、該焦点検出部材のそれぞれの焦
点部は光軸方向平面であつて該焦点部と同数の平
面のそれぞれに光軸方向において互いに重畳する
ことなく設けられ、これらの焦点部のうちの一の
焦点部をフイルム面と光学的に等価な位置に配設
し、該焦点検出部材においてピント合わせを行う
ようにしたことを特徴とする一眼レフカメラの合
焦検出装置。 A focus detection member having at least three focal points is provided in the optical path, and each focal point of the focus detection member is a plane in the optical axis direction, and the same number of planes as the focal points overlap each other in the optical axis direction. A single-lens reflex camera characterized in that one of these focal parts is arranged at a position optically equivalent to the film surface, and focusing is performed using the focus detection member. Camera focus detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8025989U JPH0320323U (en) | 1989-07-07 | 1989-07-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8025989U JPH0320323U (en) | 1989-07-07 | 1989-07-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0320323U true JPH0320323U (en) | 1991-02-27 |
Family
ID=31625154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8025989U Pending JPH0320323U (en) | 1989-07-07 | 1989-07-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0320323U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010039320A (en) * | 2008-08-07 | 2010-02-18 | Hoya Corp | Focusing plate for single-lens reflex camera |
-
1989
- 1989-07-07 JP JP8025989U patent/JPH0320323U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010039320A (en) * | 2008-08-07 | 2010-02-18 | Hoya Corp | Focusing plate for single-lens reflex camera |
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