JPS55106420A - Focusing detector - Google Patents
Focusing detectorInfo
- Publication number
- JPS55106420A JPS55106420A JP1365679A JP1365679A JPS55106420A JP S55106420 A JPS55106420 A JP S55106420A JP 1365679 A JP1365679 A JP 1365679A JP 1365679 A JP1365679 A JP 1365679A JP S55106420 A JPS55106420 A JP S55106420A
- Authority
- JP
- Japan
- Prior art keywords
- light
- portions
- focusing
- light absorbing
- regions
- 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.)
- Granted
Links
Landscapes
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To prevent the harmful rays in the boundary regions of lens elements and accurately detect focusing by letting the boundary portions where the convex faces of the small lens elements of the small lens group through which the light from photographing lens is passed intersect be light absorbing portions.
CONSTITUTION: Light absorbing material 4 is filled, coated or affixed in the portions of the troughs constituting the boundary regions W of lens elements. E.g., the light absorptive material comprising dispersing carbon black in epoxy resin is used. By letting the boundary regions W be such light absorbing parts, the progression of the rays arrived at said regions is blocked and the production of noise prevented. The light from the outside circumferential portions of the exit pupil of photographing lens 1 is passed through a small lens group 2 and is entered to a pair of self-scanning type photoelectric element arrays 3. The focusing is detected by the phase differences of the output signals from these photoelectric element arrays. Noise may be prevented and the accurate focusing detection accomplished.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1365679A JPS55106420A (en) | 1979-02-08 | 1979-02-08 | Focusing detector |
US06/117,818 US4414470A (en) | 1979-02-08 | 1980-02-01 | Pupil divisional focusing position detection apparatus using lenticula lens |
DE3004703A DE3004703C2 (en) | 1979-02-08 | 1980-02-08 | Device for determining the focus of an object on an image plane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1365679A JPS55106420A (en) | 1979-02-08 | 1979-02-08 | Focusing detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55106420A true JPS55106420A (en) | 1980-08-15 |
JPH0113082B2 JPH0113082B2 (en) | 1989-03-03 |
Family
ID=11839244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1365679A Granted JPS55106420A (en) | 1979-02-08 | 1979-02-08 | Focusing detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55106420A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4695719A (en) * | 1983-12-05 | 1987-09-22 | Honeywell Inc. | Apparatus and method for opto-electronic package |
-
1979
- 1979-02-08 JP JP1365679A patent/JPS55106420A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4695719A (en) * | 1983-12-05 | 1987-09-22 | Honeywell Inc. | Apparatus and method for opto-electronic package |
Also Published As
Publication number | Publication date |
---|---|
JPH0113082B2 (en) | 1989-03-03 |
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