JPS5689023A - Photometry device - Google Patents
Photometry deviceInfo
- Publication number
- JPS5689023A JPS5689023A JP16669479A JP16669479A JPS5689023A JP S5689023 A JPS5689023 A JP S5689023A JP 16669479 A JP16669479 A JP 16669479A JP 16669479 A JP16669479 A JP 16669479A JP S5689023 A JPS5689023 A JP S5689023A
- Authority
- JP
- Japan
- Prior art keywords
- photodetectors
- measured
- circumferential
- elements
- center
- 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
- 238000005375 photometry Methods 0.000 title abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
PURPOSE:To make it easy to process a photodetector output by decreasing the number of photodetectors at a circumferential parts and by performing photometry so that while the center part of a screen is thin, the circumferential part will be rough. CONSTITUTION:The number of photodetectors arranged at the circumferential part of a screen is made less than that of photodetectors in the center. For example, A has the circumferential part measured by one element 10 and the center part measured by group 11 of 36 elements; B has the circumferential parts divided into four and while respective parts are measured by elements 12a-12d, the center part is measured by group 13 of 12 elements. Consequently, outputs of the photodetectors can easily be processed and correct exposure can be determined.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16669479A JPS5689023A (en) | 1979-12-21 | 1979-12-21 | Photometry device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16669479A JPS5689023A (en) | 1979-12-21 | 1979-12-21 | Photometry device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5689023A true JPS5689023A (en) | 1981-07-20 |
Family
ID=15836001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16669479A Pending JPS5689023A (en) | 1979-12-21 | 1979-12-21 | Photometry device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5689023A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6474425A (en) * | 1987-09-16 | 1989-03-20 | Nikon Corp | Photodetecting element for light measurement of camera |
US6385403B1 (en) | 1998-10-30 | 2002-05-07 | Olympus Optical Co., Ltd. | Photometric apparatus for microscope |
-
1979
- 1979-12-21 JP JP16669479A patent/JPS5689023A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6474425A (en) * | 1987-09-16 | 1989-03-20 | Nikon Corp | Photodetecting element for light measurement of camera |
US6385403B1 (en) | 1998-10-30 | 2002-05-07 | Olympus Optical Co., Ltd. | Photometric apparatus for microscope |
US6505004B2 (en) | 1998-10-30 | 2003-01-07 | Olympus Optical Co., Ltd. | Photometric apparatus for microscope |
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