SE8701978L - LIGHT DETECTOR DEVICE - Google Patents

LIGHT DETECTOR DEVICE

Info

Publication number
SE8701978L
SE8701978L SE8701978A SE8701978A SE8701978L SE 8701978 L SE8701978 L SE 8701978L SE 8701978 A SE8701978 A SE 8701978A SE 8701978 A SE8701978 A SE 8701978A SE 8701978 L SE8701978 L SE 8701978L
Authority
SE
Sweden
Prior art keywords
detector plate
light
screen
sun
detector
Prior art date
Application number
SE8701978A
Other languages
Swedish (sv)
Other versions
SE8701978D0 (en
SE459287B (en
Inventor
B H Bjoerkman
Original Assignee
Philips Norden Ab
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 Philips Norden Ab filed Critical Philips Norden Ab
Priority to SE8701978A priority Critical patent/SE459287B/en
Publication of SE8701978D0 publication Critical patent/SE8701978D0/en
Publication of SE8701978L publication Critical patent/SE8701978L/en
Publication of SE459287B publication Critical patent/SE459287B/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/78—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using electromagnetic waves other than radio waves

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Blinds (AREA)

Abstract

The optical system includes a collection lens (10) with an optical axis (11), and a light-sensitive detector plate (12). The detector plate is located in the focal plane of the system, and emits a current (13) proportional to incoming radiation which is amplified in an amplifier (14). In front of the detector plate is a movable sun screen (15) in the form of a long horizontal strip or rod extending over the whole detector plate. On its side turned away from the detector plate and towards the light entry aperture, the sun screen has two light-sensitive surfaces. The uppermost surface is connected to the positive input of a differential amplifier, whilst the lower surface is connected to the amplifier negative input. Output signals from the light-sensitive surface of the sun screen are fed to a drive unit which moves the screen over the detector plate. The drive unit and the light-sensitive surface form a servo-circuit which when radiation from the sun comes into the detector causes the screen to be automatically driven to the position where the picture of the sun is located on the detector plate, thus preventing solar radiations reaching the plate. (Provisional basic advised week 89/02)
SE8701978A 1987-05-14 1987-05-14 Light detector for laser alarm SE459287B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8701978A SE459287B (en) 1987-05-14 1987-05-14 Light detector for laser alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8701978A SE459287B (en) 1987-05-14 1987-05-14 Light detector for laser alarm

Publications (3)

Publication Number Publication Date
SE8701978D0 SE8701978D0 (en) 1987-05-14
SE8701978L true SE8701978L (en) 1988-11-15
SE459287B SE459287B (en) 1989-06-19

Family

ID=20368508

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8701978A SE459287B (en) 1987-05-14 1987-05-14 Light detector for laser alarm

Country Status (1)

Country Link
SE (1) SE459287B (en)

Also Published As

Publication number Publication date
SE8701978D0 (en) 1987-05-14
SE459287B (en) 1989-06-19

Similar Documents

Publication Publication Date Title
EP0176307B1 (en) Television cameras
JPS5591268A (en) Blooming reduction device for image pickup device
SE8701978L (en) LIGHT DETECTOR DEVICE
JPS55105236A (en) Display device of measureing apparatus
GB1193902A (en) High-Speed Framing Camera and Illumination System
JPS55106421A (en) Focusing detector
JPS5669606A (en) Focus detector
JPS5541432A (en) Focus detector
GB1252498A (en)
JPS5716411A (en) Focusing detector
JPS6236385Y2 (en)
JPS57190472A (en) Two-dimensional solid state image pickup device
JPS5721175A (en) Infrared ray video device
JPS5511606A (en) Photoelectric conversion device
GB1532096A (en) Infra red lenses
JPS56122069A (en) Copying system using photodetector and light emitting element
JPS5618472A (en) Solid-state image pickup device
GB1407509A (en) Split-image rangefinder for optical-electronic detecting instruments
JPS5731270A (en) Flash pickup device
JPS578539A (en) Residual film frame number display device of camera for endoscope
GB1110593A (en) Photoelectric device
JPS57129430A (en) Infrared-ray image pickup device
GB1261923A (en) Photoelectric apparatus and photographic cameras
GB1181231A (en) Improvements relating to Photo-Electrical Sensitive Devices
JPS56126813A (en) Incident position detector of luminous flux

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 8701978-2

Effective date: 19931210

Format of ref document f/p: F