SE8701978D0 - LIGHT DETECTOR DEVICE - Google Patents
LIGHT DETECTOR DEVICEInfo
- Publication number
- SE8701978D0 SE8701978D0 SE8701978A SE8701978A SE8701978D0 SE 8701978 D0 SE8701978 D0 SE 8701978D0 SE 8701978 A SE8701978 A SE 8701978A SE 8701978 A SE8701978 A SE 8701978A SE 8701978 D0 SE8701978 D0 SE 8701978D0
- Authority
- SE
- Sweden
- Prior art keywords
- detector plate
- light
- screen
- sun
- detector
- Prior art date
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)
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 true SE8701978D0 (en) | 1987-05-14 |
SE8701978L 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) |
-
1987
- 1987-05-14 SE SE8701978A patent/SE459287B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE459287B (en) | 1989-06-19 |
SE8701978L (en) | 1988-11-15 |
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 |