JPS5540459A - Focus adjusting method of optical system - Google Patents
Focus adjusting method of optical systemInfo
- Publication number
- JPS5540459A JPS5540459A JP11324678A JP11324678A JPS5540459A JP S5540459 A JPS5540459 A JP S5540459A JP 11324678 A JP11324678 A JP 11324678A JP 11324678 A JP11324678 A JP 11324678A JP S5540459 A JPS5540459 A JP S5540459A
- Authority
- JP
- Japan
- Prior art keywords
- spacing
- light
- lens unit
- change
- optical system
- 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
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
PURPOSE: To prevent the change in printing width accompanied with focus adjustment by changing the spacing between each lens in the expander lens unit thereby performing focus adjustment.
CONSTITUTION: The spacing d between the lenses 61 and 62 in the expander lens unit 6 disposed between the second reflecting mirror 5 which reflects the laser light 4 having passed through a modulator 3 and a rotary mirror 8 is made adjustable. When the spacing d is made d' where the spacing d is d and where it is assumed that the magnified light 7 is parallel rays, then the light 7' is no longer parallel rays and the size of the image when it reached a projecting lens 9 differs form the one when it is out from the expander lens unit 6, thus the fous position is controlled. Hence, with the position of the projecting lens 9 being intact, the focus position is adjusted and the scanning range of light on the recording plane 10' does not change, thus the intended object is achieved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11324678A JPS5540459A (en) | 1978-09-14 | 1978-09-14 | Focus adjusting method of optical system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11324678A JPS5540459A (en) | 1978-09-14 | 1978-09-14 | Focus adjusting method of optical system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5540459A true JPS5540459A (en) | 1980-03-21 |
Family
ID=14607268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11324678A Pending JPS5540459A (en) | 1978-09-14 | 1978-09-14 | Focus adjusting method of optical system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5540459A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61234306A (en) * | 1985-04-09 | 1986-10-18 | Mitsutoyo Mfg Corp | Optical measuring apparatus |
JPH01101511A (en) * | 1987-10-14 | 1989-04-19 | Fuji Photo Film Co Ltd | Laser light source for multiplexing |
JPH02271314A (en) * | 1989-04-12 | 1990-11-06 | Canon Inc | Optical scanner |
-
1978
- 1978-09-14 JP JP11324678A patent/JPS5540459A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61234306A (en) * | 1985-04-09 | 1986-10-18 | Mitsutoyo Mfg Corp | Optical measuring apparatus |
WO1986006159A1 (en) * | 1985-04-09 | 1986-10-23 | Mitutoyo Mfg. Co., Ltd. | Optical measuring instrument |
JPH01101511A (en) * | 1987-10-14 | 1989-04-19 | Fuji Photo Film Co Ltd | Laser light source for multiplexing |
JP2631666B2 (en) * | 1987-10-14 | 1997-07-16 | 富士写真フイルム株式会社 | Laser light source device for multiplexing |
JPH02271314A (en) * | 1989-04-12 | 1990-11-06 | Canon Inc | Optical scanner |
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