JPS6436824U - - Google Patents
Info
- Publication number
- JPS6436824U JPS6436824U JP13007687U JP13007687U JPS6436824U JP S6436824 U JPS6436824 U JP S6436824U JP 13007687 U JP13007687 U JP 13007687U JP 13007687 U JP13007687 U JP 13007687U JP S6436824 U JPS6436824 U JP S6436824U
- Authority
- JP
- Japan
- Prior art keywords
- focus detection
- detection device
- focus
- light
- auxiliary light
- 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 6
- 230000004907 flux Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
Landscapes
- Focusing (AREA)
Description
第１図は本考案によるカメラの焦点検出装置の
一実施例を示す概略線図、第２図は第１図の装置
に用いられるフイルタの分光透過率特性図、第３
図は他の実施例に用いられるフイルタの分光透過
率特性図、第４図はＴＴＬ方式の焦点検出装置の
原理説明図である。
１……撮影レンズ、４……イメージセンサ、９
……メインフラツシユ、１０……小型フラツシユ
、１２……投射レンズ、１３……ダイクロイツク
フイルタ。
FIG. 1 is a schematic diagram showing an embodiment of a camera focus detection device according to the present invention, FIG. 2 is a spectral transmittance characteristic diagram of a filter used in the device of FIG. 1, and FIG.
The figure is a spectral transmittance characteristic diagram of a filter used in another embodiment, and FIG. 4 is a diagram explaining the principle of a TTL type focus detection device. 1...Photographing lens, 4...Image sensor, 9
...Main flash, 10...Small flash, 12...Projection lens, 13...Dichroic filter.
Claims (1)
て、撮影レンズの合焦位置を検出し、被写体像が
低輝度かあるいは低輝度で且つ低コントラストの
ため焦点検出不能と判断されたときは焦点検出可
能となるように補助光を投射するカメラの焦点検
出装置において、前記補助光の波長をほぼ６５０
ｎｍ以下としたことを特徴とする焦点検出装置。 (2) 前記被写体光束のうち波長がほぼ６５０ｎ
ｍ以上の光を遮断する近赤外カツトフイルタを設
けた実用新案請求の範囲第１項に記載のカメラの
焦点検出装置。[Scope of claim for utility model registration] (1) Detecting the in-focus position of the photographing lens by using the subject light flux that has passed through the photographing lens, and detecting the focus because the subject image is of low brightness or low brightness and low contrast. In a camera focus detection device that projects an auxiliary light so that focus detection is possible when it is determined that the auxiliary light cannot be detected, the wavelength of the auxiliary light is set to approximately 650 nm.
A focus detection device characterized in that the diameter is below nm. (2) The wavelength of the subject light flux is approximately 650n.
A focus detection device for a camera according to claim 1 of the utility model, which is provided with a near-infrared cutoff filter that blocks light of wavelengths greater than m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13007687U JPS6436824U (en) | 1987-08-28 | 1987-08-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13007687U JPS6436824U (en) | 1987-08-28 | 1987-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6436824U true JPS6436824U (en) | 1989-03-06 |
Family
ID=31384915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13007687U Pending JPS6436824U (en) | 1987-08-28 | 1987-08-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6436824U (en) |
-
1987
- 1987-08-28 JP JP13007687U patent/JPS6436824U/ja active Pending
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