US4845570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical image sensor
Assignee: Tokyo Electron Ltd
•
Filing: 1987-09-25
•
Granted: 1989-07-04
•
Expires: 2007-09-25
Abstract
Abstract An optical image sensor has a body case on which an elongate image sensing window is formed, a linear lamp disposed in the case so as to be parallel to the window, and an optically image snesing unit disposed in the case. The unit optically senses the image on a document moving on the case across the window by utilizing the reflection of light emitted from the lamp when the image passes over the window. The linear lamp is so disposed in the case that the center in the longitudinal direction thereof is not brought into coincidence with the center of the window, and a portion of the case, corresponding to the one end of the lamp which is further away from the center of the window, is constructed as a pair of article holding recesses.
Inventors
- 👤 Masahiro Uchiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/02815; H04N1/02845; H04N1/0287; H04N1/00519; H04N1/00525
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
An optical image sensor comprising a body case on which an elongated image sensing window is formed, a linear lamp disposed in the body case so as to be parallel to the image sensing window, and optically sensing means disposed in the body case, wherein the optically image sensing means optically senses the image on a document moving on the case to cross the image sensing window by utilizing the reflection of light emitted from the lamp when the image passes over the image sensing window, said linear lamp is so disposed in the body case that the center in the longitudinal direction thereof is not brought into coincidence with the center of the image sensing window in the longitudinal direction, and a portion of the body case, corresponding to the one end of the linear lamp which is further away from the center of said image sensing window, comprises an article holding means.
Claim 2
Dependent Claim
154 words
An optical image sensor comprising a body case on which an elongated image sensing window is formed, a linear lamp disposed in the body case so as to be parallel to the image sensing window, and optically sensing means disposed in the body case, wherein the optically image sensing means optically senses the image on a document moving on the case to cross the image sensing window by utilizing the reflection of light emitted from the lamp when the image passes over the image sensing window, said linear lamp is so disposed in the body case that the center in the longitudinal direction thereof is not brought into coincidence with the center of the image sensing window in the longitudinal direction, and a portion of the body case, corresponding to the one end of the linear lamp which is further away from the center of said image sensing window, comprises an article holding means.
Claim 3
Dependent Claim
90 words
The optical image sensor according to claim 1, wherein said optical image sensor is a device with a handset, said article holding means is a pair of article holding recesses formed in correspondence with a speaker and a receiver of the handset and holding the speaker and the receiver, and the one end of said linear lamp is disposed inside a portion of the body case located between the pair of article holding recesses of the body case and having a height higher than the pair of article holding recesses.
Claim 4
Dependent Claim
20 words
The optical image sensor according to claim 2, wherein said higher portion of the body case is a handset cradle.
Claim 5
Dependent Claim
45 words
The optical image sensor according to claim 1, wherein said lamp has a characteristic luminous intensity distribution curve, said optical image sensor further comprises means for flattening said luminous intensity distribution curve generated in the image sensing window by the light emitted from the lamp.
Claim 6
Dependent Claim
58 words
The optical image sensor according to claim 4, wherein said means for flattening the luminous intensity distribution curve comprises means for reflecting a part of the light, which is emitted from the lamp and not directed at the image sensing window, toward one end of the image sensing window disposed near to the other end of the lamp.
Claim 7
Dependent Claim
27 words
The optical image sensor according to claim 5, wherein said light reflecting means is a mirror disposed near to said one end of the image sensing window.
Claim 8
Dependent Claim
128 words
The optical image sensor according to claim 4, wherein said means for flattening the luminous intensity distribution curve comprises a transparent light diffusing plate located between the lamp and the image sensing window and positioned to flatten the luminous intensity distribution curve generated in the image sensing window by diffusing the light directed from the lamp to the image sensing window, and a reflecting plate disposed around the lamp at a position substantially symmetrical with respect to the image sensing window, and the light reflecting surface of the reflecting plate is so formed that the reflectance of at least a portion thereof facing toward said other end of the lamp is higher than that of the other portion thereof not facing toward said other end of the lamp.
Claim 9
Dependent Claim
62 words
The optical image sensor according to claim 7, wherein said higher reflectance portion on the light reflecting surface of said reflecting plate is colored with a color having a first reflectance, and said other end portion, having lower reflectance, on the light reflecting surface of said reflecting plate is colored with a color having a second reflectance lower than said first reflectance.
Claim 10
Dependent Claim
80 words
The optical sensor according to claim 7, wherein said reflecting plate is formed of metal or plastic, the color of either of which has a first reflectance, said higher reflectance portion on the light reflecting surface of said reflecting plate is constructed by texture of its material, and said other portion, having low reflectance, on the light reflecting surface of said reflecting plate is processed to be colored with a color having a second reflectance lower than said first reflectance.
Claim 11
Dependent Claim
70 words
The optical image sensor according to claim 7, wherein said reflecting plate is formed of metal having a relatively high reflectance, said higher reflectance portion on the light reflecting surface of said reflecting plate is constructed by planishing, and said other portion, having low reflectance, on the light reflecting surface of said reflecting plate is processed to be colored with a color having a lower reflectance than said planished portion.
References Cited (Backward Citations)
US4442459A
Cited
JPS55130267A
Cited
JPS5714246A
Cited
DE3412501A1
Cited
JPS60250772A
Cited
DE3538217A1
Cited
US4682042A
Cited
GB2178263A
Cited
US4652937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |