JPS557727A - Planoconvex lens - Google Patents
Planoconvex lensInfo
- Publication number
- JPS557727A JPS557727A JP7988378A JP7988378A JPS557727A JP S557727 A JPS557727 A JP S557727A JP 7988378 A JP7988378 A JP 7988378A JP 7988378 A JP7988378 A JP 7988378A JP S557727 A JPS557727 A JP S557727A
- Authority
- JP
- Japan
- Prior art keywords
- center
- exit pupil
- scanning
- image
- theta1
- 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 let the size or imaging point position of image be proportional to scanning angles by using the planoconvex lens which satisfies the specific conditions and in which the center of the exit pupil becomes nearly equal to the center of the curvature of the convex face. CONSTITUTION:If a refractive index n, the scanning angle theta1 of the parallel luminous flux 2 reflected by a rotary mirror 1 or the like and a planoconvex lens 3 in which the center 5 of its exit pupil intersecting with the optical axis 6 is linearly in alignment to the center of curvature of the convex face are so made that the value delta satisfying the conditions of the formula I becomes less than 0.02, then the size or imaging point of the image formed on the image forming plane 4 is proportional to the scanning angle theta1. Hence, the good scanning image free from distortions, etc. may be formed by the good f.theta lens of the simple consitution. Here, theta1' denotes the angle at which the main ray at the exit pupil assumes optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7988378A JPS557727A (en) | 1978-06-30 | 1978-06-30 | Planoconvex lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7988378A JPS557727A (en) | 1978-06-30 | 1978-06-30 | Planoconvex lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS557727A true JPS557727A (en) | 1980-01-19 |
| JPS6145805B2 JPS6145805B2 (en) | 1986-10-09 |
Family
ID=13702641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7988378A Granted JPS557727A (en) | 1978-06-30 | 1978-06-30 | Planoconvex lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS557727A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57144518A (en) * | 1981-03-03 | 1982-09-07 | Canon Inc | Scan optical system having fall compensating function |
| JP2017016144A (en) * | 2016-09-20 | 2017-01-19 | キヤノン株式会社 | Optical scanning device and image forming apparatus using the same |
| JP6429944B1 (en) * | 2017-05-30 | 2018-11-28 | キヤノン株式会社 | Optical scanning device and image forming apparatus having the same |
-
1978
- 1978-06-30 JP JP7988378A patent/JPS557727A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57144518A (en) * | 1981-03-03 | 1982-09-07 | Canon Inc | Scan optical system having fall compensating function |
| JP2017016144A (en) * | 2016-09-20 | 2017-01-19 | キヤノン株式会社 | Optical scanning device and image forming apparatus using the same |
| JP6429944B1 (en) * | 2017-05-30 | 2018-11-28 | キヤノン株式会社 | Optical scanning device and image forming apparatus having the same |
| JP2018205361A (en) * | 2017-05-30 | 2018-12-27 | キヤノン株式会社 | Optical scanner and image formation device having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6145805B2 (en) | 1986-10-09 |
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