JPS55153929A - Exposure time and exposure lap time display method in automatic exposure device for microscope - Google Patents
Exposure time and exposure lap time display method in automatic exposure device for microscopeInfo
- Publication number
- JPS55153929A JPS55153929A JP6048979A JP6048979A JPS55153929A JP S55153929 A JPS55153929 A JP S55153929A JP 6048979 A JP6048979 A JP 6048979A JP 6048979 A JP6048979 A JP 6048979A JP S55153929 A JPS55153929 A JP S55153929A
- Authority
- JP
- Japan
- Prior art keywords
- exposure
- voltage
- time
- logarithmic
- point
- 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
- Details Of Cameras Including Film Mechanisms (AREA)
- Microscoopes, Condenser (AREA)
Abstract
PURPOSE: To prevent the failure of photographing by displaying the integrated value to the lap time of exposure in the exposure device which converts the light from sample light to electric output, integrates this output and makes the time until it coincides with a reference value as its exposure time.
CONSTITUTION: When the light IL from the sample enters a photoelectric transducer 1, the voltage adding the voltage proportional to the logarithmic value of photo current i1 and bias voltages E1WE3 is generated at the A point by way of a logarithmic diode 2 and input voltage follower type amplifier 4. When the change- over switch is on the (a) side, the exposure time corresponding to the photo current i1 and set information (E1WE3) is displayed in a voltmeter 14. since the voltage at the B point is the integrated value of the current i2 revers-converting the voltage at the A point by a logarithmic diode 3, the voltage across the logarithmic diode, that is, the residual exposure amount, is displayed in the voltmeter 14 when the contacts of the switch 15 are on the (b) side. Hence, the calibration of exposure may be done and therefore the failure of photographing may be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6048979A JPS55153929A (en) | 1979-05-18 | 1979-05-18 | Exposure time and exposure lap time display method in automatic exposure device for microscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6048979A JPS55153929A (en) | 1979-05-18 | 1979-05-18 | Exposure time and exposure lap time display method in automatic exposure device for microscope |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55153929A true JPS55153929A (en) | 1980-12-01 |
Family
ID=13143738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6048979A Pending JPS55153929A (en) | 1979-05-18 | 1979-05-18 | Exposure time and exposure lap time display method in automatic exposure device for microscope |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55153929A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4847330A (en) * | 1971-10-15 | 1973-07-05 |
-
1979
- 1979-05-18 JP JP6048979A patent/JPS55153929A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4847330A (en) * | 1971-10-15 | 1973-07-05 |
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