Optical scanning apparatus and image forming apparatus including the optical scanning apparatus
US-9522545-B2 · Dec 20, 2016 · US
Optical writing head and image forming apparatus
US8994769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994769-B2 |
| Application number | US-201213346994-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 10, 2012 |
| Priority date | Jan 14, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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- Title
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Abstract
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An optical writing head allows the formation of a light collective spot with a small diameter and the acquisition of a deep focal depth to go together. An optical writing head includes a light emitting element array in which a plurality of light emitting elements is arranged, and a lens system including a lens array configured to concentrate luminous flux radiated from the light emitting element to a predetermined image plane, in which the lens system is telecentric on the image side and satisfies the following conditional expression, where a wavelength at which luminous flux radiated from the light emitting element has a peak light intensity is λ 0 , axial chromatic aberration of a wavelength having a light intensity approximately 0.81 times the peak light intensity is Δ sk , and the numerical aperture of the lens system on the image side is NA. Δ sk > λ 0 2 1 NA ( λ 0 ) 2
First claim
Opening claim text (preview).
What is claimed is: 1. An optical writing head comprising: a light emitting element array in which a plurality of light emitting elements is arranged; and an optical system configured to concentrate luminous flux radiated from the light emitting element to a predetermined image plane, wherein the optical system satisfies a conditional expression Δ sk…
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Classifications
Physics · mapped topic
Operations & Transport · mapped topic
- B41J2/451Primary
Operations & Transport · mapped topic
- G02B27/4211Primary
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8994769B2 cover?
- An optical writing head allows the formation of a light collective spot with a small diameter and the acquisition of a deep focal depth to go together. An optical writing head includes a light emitting element array in which a plurality of light emitting elements is arranged, and a lens system including a lens array configured to concentrate luminous flux radiated from the light emitting elemen…
- Who is the assignee on this patent?
- Nobayashi Kazuya, Canon Kk
- What technology area does this patent fall under?
- Primary CPC classification B41J2/451. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).