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 microscope

Info

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
Application number
JP6048979A
Other languages
Japanese (ja)
Inventor
Yutaka Hirano
Keizo Tajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UNION KOGAKU KK
Original Assignee
UNION KOGAKU KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by UNION KOGAKU KK filed Critical UNION KOGAKU KK
Priority to JP6048979A priority Critical patent/JPS55153929A/en
Publication of JPS55153929A publication Critical patent/JPS55153929A/en
Pending legal-status Critical Current

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
JP6048979A 1979-05-18 1979-05-18 Exposure time and exposure lap time display method in automatic exposure device for microscope Pending JPS55153929A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847330A (en) * 1971-10-15 1973-07-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847330A (en) * 1971-10-15 1973-07-05

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