Lens unit, LED head, exposing unit, image forming apparatus,...

Details Lens unit, LED head, exposing unit, image forming apparatus,... Lens unit, LED head, exposing unit, image forming apparatus,...

2011-08-16

2011-08-16

Phan, James (Department: 2872)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

C359S205100, C359S621000, C359S626000, C347S244000, C362S268000, C399S218000

Reexamination Certificate

active

08000015

ABSTRACT:
Lens pairs include: a first lens to form an intermediate image, which is an inverted image of an object, on an intermediate image plane; and a second lens to form an image of the object, which is an inverted image of the intermediate image, on the image plane. A ratio of SO1(the distance between the first principal plane of the first lens and the object plane) to SI1(the distance between the second principal plane of the first lens and the intermediate image plane) is substantially the same as the ratio of SI2(the distance between the second principal plane of the second lens and the imaging plane) to SO2(the distance between the first principal plane of the second lens and the intermediate image plane). The distance between the first lens and the object plane is different from a distance between the second lens and the imaging plane.

REFERENCES:
patent: 2001/0028506 (2001-10-01), Fujimoto et al.
patent: 2009/0067055 (2009-03-01), Yamamura
patent: 2000-221445 (2000-08-01), None

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