US4886366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reference corrected color sensor
Assignee: Hoya Corp
•
Filing: 1987-12-10
•
Granted: 1989-12-12
•
Expires: 2007-12-10
Abstract
Abstract A color sensor comprising a plurality of detecting units. One of the detecting units may inspect the color of an object to be examined, and the other may inspect the color of the reference object simultaneously and independently. The reflected light of the object to be examined is corrected by the reflected light of the reference object. The lights reflected from the object to be examined and the reference object are derived from the same light source.
Inventors
- 👤 Yasuo Kogure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/0205; G01J3/0218; G01J3/46; G01J3/50; G01J3/52; G01J3/524; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/4738; G01N21/474; G01J3/465; G01N2021/1748; G01N2021/4742
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
A color sensor comprising a first detecting unit and a second detecting unit, each of said detecting units separating respectiv received beams into three color components and measuring respective quantities of light of said color components; a reference object; an object being examined; means for illuminating said reference object and said object being exmined with light; first means for directing a portion of said light reflected from said reference object to said first detecting unit; second means for directing a portion of light reflected from said object being examined to said second detecting unit; and means for comparing corresponding pairs of said measured quantities of light of said color component produced by said first and second detecting units, thereby correcting a measured color of said object being examined.
Claim 2
Dependent Claim
128 words
A color sensor comprising a first detecting unit and a second detecting unit, each of said detecting units separating respectiv received beams into three color components and measuring respective quantities of light of said color components; a reference object; an object being examined; means for illuminating said reference object and said object being exmined with light; first means for directing a portion of said light reflected from said reference object to said first detecting unit; second means for directing a portion of light reflected from said object being examined to said second detecting unit; and means for comparing corresponding pairs of said measured quantities of light of said color component produced by said first and second detecting units, thereby correcting a measured color of said object being examined.
Claim 3
Dependent Claim
28 words
A color sensor as recited in claim 1, wherein said illuminating means comprises a single light source for illuminating both said reference object and said object being examined.
Claim 4
Dependent Claim
70 words
A color sensor as recited in claim 2, wherein said illuminating means comprises two optical fibers extending from said single light source to said reference object and said object being examined respectively, said first directing means comprises an optical fiber extending from said reference object to said first detecting unit, and said second directing means comprises an optical fiber extending from said object being examined to said second detecting unit.
References Cited (Backward Citations)
DE227510C
Cited
US3562539A
Cited
DE2606675A1
Cited
US4152075A
Cited
DE2714043A1
Cited
FR2386813A1
Cited
US4568186A
Cited
US4278353A
Cited
DE3244286A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |