JPS55115038A - Diffusion light source type shutter testing device - Google Patents
Diffusion light source type shutter testing deviceInfo
- Publication number
- JPS55115038A JPS55115038A JP2302379A JP2302379A JPS55115038A JP S55115038 A JPS55115038 A JP S55115038A JP 2302379 A JP2302379 A JP 2302379A JP 2302379 A JP2302379 A JP 2302379A JP S55115038 A JPS55115038 A JP S55115038A
- Authority
- JP
- Japan
- Prior art keywords
- shutter
- photoelectric transducer
- imaging lens
- photoelectric
- slit
- 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
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
PURPOSE: To achieve higher accuracy of testing by disposing an imaging lens between shutter curtain travel face and photoelectric transducer.
CONSTITUTION: An imaging lens 30 is disposed between the shutter travel face on which shutter front, rear curtains 14a, 14b travel and a photoelectric transducer PC. The imaging lens 30 is let to form the image of the secondary light source existing between shutter-slit-forming edges on the photo detecting surface of the photoelectric transducer PC. As a result of this, the sharp shutter slit is imaged on the photo detecting surface of the photoelectric transducer PC and this results in that the light from the entire region of the objective lens 13 arrives, thus the decrease in the peak value of the photoelectric output and the dulling of the waveforms are prevented and the accuracy of measurement improved. If the imaging lens 30 is such a lens which magnifies the shutter slit and forms its image on the photoelectric transducer PC, the photoelectric output becomes close to square waves and the accuracy of measurement becomes much better.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2302379A JPS55115038A (en) | 1979-02-28 | 1979-02-28 | Diffusion light source type shutter testing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2302379A JPS55115038A (en) | 1979-02-28 | 1979-02-28 | Diffusion light source type shutter testing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55115038A true JPS55115038A (en) | 1980-09-04 |
Family
ID=12098877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2302379A Pending JPS55115038A (en) | 1979-02-28 | 1979-02-28 | Diffusion light source type shutter testing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55115038A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6010240A (en) * | 1983-06-30 | 1985-01-19 | Copal Co Ltd | Testing device for curtain travel of focal plane shutter |
-
1979
- 1979-02-28 JP JP2302379A patent/JPS55115038A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6010240A (en) * | 1983-06-30 | 1985-01-19 | Copal Co Ltd | Testing device for curtain travel of focal plane shutter |
JPH0563782B2 (en) * | 1983-06-30 | 1993-09-13 | Copal Co Ltd |
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