JPH03136566A - Transparent plate for paper feeder and original reader using the same - Google Patents

Transparent plate for paper feeder and original reader using the same

Info

Publication number
JPH03136566A
JPH03136566A JP1275667A JP27566789A JPH03136566A JP H03136566 A JPH03136566 A JP H03136566A JP 1275667 A JP1275667 A JP 1275667A JP 27566789 A JP27566789 A JP 27566789A JP H03136566 A JPH03136566 A JP H03136566A
Authority
JP
Japan
Prior art keywords
light
transparent plate
paper feeder
original
microlenses
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
Application number
JP1275667A
Other languages
Japanese (ja)
Inventor
Yoichiro Miyaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP1275667A priority Critical patent/JPH03136566A/en
Publication of JPH03136566A publication Critical patent/JPH03136566A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the S/N with respect to a dark signal by forming a high refraction rate to a transparent plate, forming microlenses thereon and providing a light shield film to the locations not requiring light transmission.
CONSTITUTION: A paper feeder plate glass 1 provided with micorlenses 2 and an optical sensor 3 are combined, and while an original 5 is fed by a roll 6, a light is radiated from a light source 7. The light from the light source is collected by the microlenses 2 on the paper feeder plate glass 1, the original is lighted efficiently, the reflecting signal light from the original face is collected again by a projection lens and reaches the optical sensor. The transparent plate is provided with the microlenses and also the light shield film and the reflection film can be provided around the transparent plate. Thus, the lighting efficiency, the S/N and the gain are improved.
COPYRIGHT: (C)1991,JPO&Japio
JP1275667A 1989-10-23 1989-10-23 Transparent plate for paper feeder and original reader using the same Pending JPH03136566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1275667A JPH03136566A (en) 1989-10-23 1989-10-23 Transparent plate for paper feeder and original reader using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1275667A JPH03136566A (en) 1989-10-23 1989-10-23 Transparent plate for paper feeder and original reader using the same

Publications (1)

Publication Number Publication Date
JPH03136566A true JPH03136566A (en) 1991-06-11

Family

ID=17558673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1275667A Pending JPH03136566A (en) 1989-10-23 1989-10-23 Transparent plate for paper feeder and original reader using the same

Country Status (1)

Country Link
JP (1) JPH03136566A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0541259U (en) * 1991-10-30 1993-06-01 リコーエレメツクス株式会社 Image reader
US7595917B2 (en) * 2002-08-27 2009-09-29 Po-Hua Fang Document scanner with light-focusing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0541259U (en) * 1991-10-30 1993-06-01 リコーエレメツクス株式会社 Image reader
US7595917B2 (en) * 2002-08-27 2009-09-29 Po-Hua Fang Document scanner with light-focusing device

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