JPS54150144A - Optical system for optical laser scanning - Google Patents
Optical system for optical laser scanningInfo
- Publication number
- JPS54150144A JPS54150144A JP5754378A JP5754378A JPS54150144A JP S54150144 A JPS54150144 A JP S54150144A JP 5754378 A JP5754378 A JP 5754378A JP 5754378 A JP5754378 A JP 5754378A JP S54150144 A JPS54150144 A JP S54150144A
- Authority
- JP
- Japan
- Prior art keywords
- focal length
- group
- convex lenses
- optical
- enables
- 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.)
- Granted
Links
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Lenses (AREA)
Abstract
PURPOSE:To reduce distortion aberrations while achieving compactification and wider angle by combining plural pieces of concave and convex lenses. CONSTITUTION:From the object face side, the 1st group L1 which is composed of a concave lens l1 and has a negative focal length and the 2nd group L2 which consists of convex lenses l2, l3 and has a positive focal length are so arrayed that formulas 1 thru 3 are satisfied where f is let to be the compound focal length of the total system, f1 is let to be the focal length of the 1st group L1, f2 to be the focal length of the 2nd group L2 and na, nb are the refractive indices of the convex lenses l2, l3. This enables compactification and wider angle to be achieved and distortion aberrations to be sufficiently corrected with less number of constituting lenses and enables the optical system which is capable of approaching the spot diameter of the beam to the diffraction limit on the image plane to be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5754378A JPS54150144A (en) | 1978-05-17 | 1978-05-17 | Optical system for optical laser scanning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5754378A JPS54150144A (en) | 1978-05-17 | 1978-05-17 | Optical system for optical laser scanning |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54150144A true JPS54150144A (en) | 1979-11-26 |
JPS6145804B2 JPS6145804B2 (en) | 1986-10-09 |
Family
ID=13058671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5754378A Granted JPS54150144A (en) | 1978-05-17 | 1978-05-17 | Optical system for optical laser scanning |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54150144A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4401362A (en) * | 1980-07-15 | 1983-08-30 | Olympus Optical Co., Ltd. | f-θ Lens system |
JPS59195211A (en) * | 1983-04-19 | 1984-11-06 | Asahi Optical Co Ltd | Telecentric ftheta lens system of four-element constitution |
JPH0296710A (en) * | 1988-06-10 | 1990-04-09 | Korea Advanced Inst Of Sci Technol | F theta lens system for optical scanning |
CN104880807A (en) * | 2015-06-19 | 2015-09-02 | 中国科学院重庆绿色智能技术研究院 | F-[theta] optical lens used for dual-wavelength laser processing |
-
1978
- 1978-05-17 JP JP5754378A patent/JPS54150144A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4401362A (en) * | 1980-07-15 | 1983-08-30 | Olympus Optical Co., Ltd. | f-θ Lens system |
JPS59195211A (en) * | 1983-04-19 | 1984-11-06 | Asahi Optical Co Ltd | Telecentric ftheta lens system of four-element constitution |
JPS6211324B2 (en) * | 1983-04-19 | 1987-03-12 | Asahi Optical Co Ltd | |
JPH0296710A (en) * | 1988-06-10 | 1990-04-09 | Korea Advanced Inst Of Sci Technol | F theta lens system for optical scanning |
JPH0812336B2 (en) * | 1988-06-10 | 1996-02-07 | 韓国科学技術院 | Fθ lens system for optical scanning |
CN104880807A (en) * | 2015-06-19 | 2015-09-02 | 中国科学院重庆绿色智能技术研究院 | F-[theta] optical lens used for dual-wavelength laser processing |
Also Published As
Publication number | Publication date |
---|---|
JPS6145804B2 (en) | 1986-10-09 |
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