JPS565520A - Light intensity evening device of hologram scanner - Google Patents
Light intensity evening device of hologram scannerInfo
- Publication number
- JPS565520A JPS565520A JP8116579A JP8116579A JPS565520A JP S565520 A JPS565520 A JP S565520A JP 8116579 A JP8116579 A JP 8116579A JP 8116579 A JP8116579 A JP 8116579A JP S565520 A JPS565520 A JP S565520A
- Authority
- JP
- Japan
- Prior art keywords
- intensity
- light intensity
- light
- hologram scanner
- photoelectrically
- 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
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
PURPOSE: To make the scanning diffraction light intensity of the hologram scanner even by photoelectrically transducing part of diffracted light by holograms to electric signal and increasing or decreasing the laser light source intensity by this electric signal.
CONSTITUTION: Laser light emitted from a laser light source 31 is intensity-modulated by a light modulator 32. This modulated signal 41 is composed of the difference comprising comparing the output having been photoelectrically tranduced a part of scanning diffracted light 40 of a hologram scanner 33 by a photoelectric transducer 37 with a reference voltage in a control circuit 38. The difference of the case when the photoelectrically tranduced output is larger than the reference voltage acts so as to lower light intensity 39 and the difference of the case when it is small acts so as to increase light intensity 39. Thereby, the light intensity of scanning diffracted light 40 may be made even. The hologram scanner 33 is made into the construction comprising providing a plurality of the holorams 34 manufactured by using convergent spherical waves and divergent spherical waves around a disc.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8116579A JPS565520A (en) | 1979-06-27 | 1979-06-27 | Light intensity evening device of hologram scanner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8116579A JPS565520A (en) | 1979-06-27 | 1979-06-27 | Light intensity evening device of hologram scanner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS565520A true JPS565520A (en) | 1981-01-21 |
Family
ID=13738840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8116579A Pending JPS565520A (en) | 1979-06-27 | 1979-06-27 | Light intensity evening device of hologram scanner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS565520A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57196213A (en) * | 1981-05-28 | 1982-12-02 | Ricoh Co Ltd | Hologram scanner |
JPS597333A (en) * | 1982-07-05 | 1984-01-14 | Ricoh Co Ltd | Optical scanning method |
JPS6190123A (en) * | 1984-10-09 | 1986-05-08 | Yokogawa Hokushin Electric Corp | Photoscanning device using hologram |
RU176394U1 (en) * | 2016-12-20 | 2018-01-17 | федеральное государственное автономное образовательное учреждение высшего образования "Российский университет дружбы народов" (РУДН) | Device for periodic modulation of laser radiation |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53148455A (en) * | 1977-05-30 | 1978-12-25 | Nippon Hoso Kyokai <Nhk> | Torsion compensating system of rotary polyhedral mirror type light beam scanner |
-
1979
- 1979-06-27 JP JP8116579A patent/JPS565520A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53148455A (en) * | 1977-05-30 | 1978-12-25 | Nippon Hoso Kyokai <Nhk> | Torsion compensating system of rotary polyhedral mirror type light beam scanner |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57196213A (en) * | 1981-05-28 | 1982-12-02 | Ricoh Co Ltd | Hologram scanner |
JPS597333A (en) * | 1982-07-05 | 1984-01-14 | Ricoh Co Ltd | Optical scanning method |
JPS6190123A (en) * | 1984-10-09 | 1986-05-08 | Yokogawa Hokushin Electric Corp | Photoscanning device using hologram |
JPH053564B2 (en) * | 1984-10-09 | 1993-01-18 | Yokogawa Electric Corp | |
RU176394U1 (en) * | 2016-12-20 | 2018-01-17 | федеральное государственное автономное образовательное учреждение высшего образования "Российский университет дружбы народов" (РУДН) | Device for periodic modulation of laser radiation |
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