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4-Traders Homepage  >  Equities  >  Tokyo  >  Nippon Sheet Glass Company, Limited    5202   JP3686800008

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Nippon Sheet Glass : Patent Issued for Method of Manufacturing Lens Array Plate, Erecting Equal-Magnification Lens Array Plate, and Optical Scanning Unit, and Image...

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07/21/2016 | 08:45pm CEST

Patent Issued for Method of Manufacturing Lens Array Plate, Erecting Equal-Magnification Lens Array Plate, and Optical Scanning Unit, and Image Reading Device (USPTO 9389341)

By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventor Nemoto, Hiroyuki (Minato-ku, JP), filed on June 20, 2012, was published online on July 12, 2016.

The assignee for this patent, patent number 9389341, is Nippon Sheet Glass Company, Limited (Tokyo, JP).

Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to an erecting equal-magnification lens array plate used in image reading devices and image writing devices.

"Some image reading devices such as scanners are known to use erecting equal-magnification optics. Erecting equal-magnification optics are capable of reducing the size of devices better than reduction optics. In the case of image reading devices, an erecting equal-magnification optical system comprises a linear light source, an erecting equal-magnification lens array, and a linear image sensor.

"In the related art, a rod lens array capable of forming an erect equal-magnification image is used as an erecting equal-magnification lens array in an erecting equal-magnification optical system. Recently, however, there is proposed an erecting equal-magnification lens array plate comprising a stack of two transparent lens array plates built such that the optical axes of individual convex lenses are aligned, where each transparent lens array plate includes a systematic arrangement of micro-convex lenses on both surfaces of the plate. Since an erecting equal-magnification lens array plate such as this comprises a stack of lens array plates that can be formed by, for example, injection molding, an erecting equal-magnification lens array can be manufactured at a relatively low cost.

"An erecting equal-magnification lens array plate lacks a wall for beam isolation between adjacent lenses. Therefore, there is a problem in that a light beam diagonally incident on an erecting equal-magnification lens array plate travels diagonally inside the plate and enters an adjacent convex lens, creating noise (referred to as ghost noise) as it leaves the plate.

"For example, patent document 1 discloses a lens array manufacturing method that addresses stray light, wherein a coarse surface part is formed between adjacent lenses, and the coarse surface part is imparted with the function of preventing transmission of light across adjacent lenses by coating the coarse surface part with a light shielding paint.

"[patent document 1] JP2002-303703

"However, since the manufacturing method disclosed in patent document 1 requires forming a coarse surface part between adjacent lenses, coating the coarse surface part with a light shielding paint, etc., the method involves quite complex processes. In particular, individual lenses used in a lens array are quite small and quite numerous. Therefore, it is not easy to coat only an area between adjacent lenses with a light shielding paint by masking the lenses. Therefore, the manufacturing cost tends to be high in the case of the manufacturing method disclosed in patent document 1."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventor's summary information for this patent: "The present invention addresses the aforementioned disadvantage and a purpose thereof is to provide a method of manufacturing a lens array plate and an erecting equal-magnification lens array plate capable of reducing the manufacturing cost.

"To address the aforementioned problem, the method of manufacturing a lens array plate according to one embodiment of the present invention comprises: forming a light shielding film on a flat surface of a substrate; and forming a plurality of lenses on the flat surface of the substrate by press molding the substrate with the light shielding film.

"The light shielding film may not be formed in a lens formation area in which a lens is formed.

"The forming of lenses by press molding may comprise: forming the lenses by pressing the lens formation area; and forming a light shielding wall surrounding the lens by pressing an area around the lens formation area formed with the light shielding film.

"The forming of the lenses and the forming of the light shielding wall may be performed at the same time.

"Another embodiment of the present invention relates to a method of manufacturing an erecting equal-magnification lens array plate. The method comprises forming a stack of a plurality of lens array plates manufactured according to the method described above.

"Still another embodiment of the present invention relates to an optical scanning unit comprising: a linear light source configured to illuminate a document to be read; the erecting equal-magnification lens array plate manufactured by the above-described method configured to condense light reflected by the document to be read; and a linear image sensor configured to receive light transmitted by the erecting equal-magnification lens array plate.

"Yet another embodiment of the present invention relates to an image reading device comprising: the above-described optical scanning unit; and an image processing unit configured to process an image signal detected by the optical scanning unit."

For more information, see this patent: Nemoto, Hiroyuki. Method of Manufacturing Lens Array Plate, Erecting Equal-Magnification Lens Array Plate, and Optical Scanning Unit, and Image Reading Device. U.S. Patent Number 9389341, filed June 20, 2012, and published online on July 12, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9389341.PN.&OS=PN/9389341RS=PN/9389341

Keywords for this news article include: Nippon Sheet Glass Company Limited.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2016, NewsRx LLC

(c) 2016 NewsRx LLC, source Science Newsletters

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Financials ( JPY)
Sales 2017 582 717 M
EBIT 2017 29 500 M
Net income 2017 4 533 M
Debt 2017 359 000 M
Yield 2017 0,75%
P/E ratio 2017 15,03
P/E ratio 2018 11,77
EV / Sales 2017 0,73x
EV / Sales 2018 0,71x
Capitalization 68 670 M
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Mean consensus HOLD
Number of Analysts 7
Average target price 92,4  JPY
Spread / Average Target 22%
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NameTitle
Shigeki Mori President, Chief Executive Officer & Director
Seiichi Asaka Chairman
Clemens Miller COO, Director & Executive Vice President
Kenichi Morooka Director, Representative EVP & CFO
Phil Wilkinson Senior Manager-Information System & Purchasing
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