Title:
IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/024573
Kind Code:
A1
Abstract:
An imaging device has a light shielding region between a cover glass of an imaging element and an optical member arranged next to the cover glass, wherein the light shielding region satisfies the following conditional expressions (1) and (2).
0.3 ≤ a/IH ≤ 1.5 ...(1), and
a1 ≤ a ≤ a2' ...(2),
where: a1 = IH − Dtanθ1; a2' is the minimum of a2, a3 and a4 (a2 = 2b − IH − Dtanθ2, a3 = b − (D/2) × tanθ3, and a4 = b − X); a is the length of the light shielding region; IH is the maximum image height in a direction along a; D is the thickness of the cover glass; θ1 is an angle formed with the optical axis by a light beam, among light beams which directly enter positions at the maximum image height in the imaging element, that comes at the maximum light beam height at the light shielding region; b is a distance from the central axis of the cover glass to either one of the side surfaces of the cover glass in the direction along a; θ2 is an angle formed with the optical axis by a light beam, among light beams which are reflected by the side surface of the cover glass and directly enter positions at the maximum image height in the imaging element, that comes at the maximum light beam height at the light shielding region; θ3 is an angle formed with the optical axis by a light beam, among light beams which enter the central portion of the side surface of the cover glass in the direction along a, that comes at the maximum light beam height at the light shielding region; and X is the height of a burr at each of the side surface of a cover glass object in the direction along a.
Inventors:
TSUJI YOSHIFUMI (JP)
Application Number:
PCT/JP2010/061829
Publication Date:
March 03, 2011
Filing Date:
July 13, 2010
Export Citation:
Assignee:
OLYMPUS MEDICAL SYSTEMS CORP (JP)
TSUJI YOSHIFUMI (JP)
TSUJI YOSHIFUMI (JP)
International Classes:
G02B7/02; G02B5/00; G03B11/00; H01L27/14; H04N5/225; H04N5/335
Domestic Patent References:
| WO2008081828A1 | 2008-07-10 |
Foreign References:
| JPH0677448A | 1994-03-18 | |||
| JP2006094955A | 2006-04-13 | |||
| JPH07311359A | 1995-11-28 | |||
| JP2007301227A | 2007-11-22 | |||
| JP2009066223A | 2009-04-02 | |||
| JP2008034502A | 2008-02-14 |
Other References:
See also references of EP 2474848A4
Attorney, Agent or Firm:
SHINOHARA, Taiji (JP)
Taiji Shinohara (JP)
Taiji Shinohara (JP)
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