US3778167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical monitoring system
Assignee: Sagem SA
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Filing: 1971-10-01
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Granted: 1973-12-11
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Expires: 1991-10-01
Abstract
Abstract A support is arranged to bear the part to be measured or checked and an optical device illuminates the part by diascopy or by episcopy by a parallel beam of light. The light source is the output end of a light guide placed at the focus of the optical device. At the distant input end is a light generator. A photoelectric receiver collects the beam of light emerging from the optical device after it has illuminated the part by diascopy or by episcopy. Relative displacement between the support and the optical device-receiver device assembly, is effected in a transverse direction with respect to the light beam. A pulse generator is actuated by this movement and delivers a number of electrical pulses proportional to the amplitude of the movement. A pulse counter receives the pulses from the pulse generator, through an electronic gate actuated by a signal from the receiver.
Inventors
- 👤 R Claret
- 👤 J Picard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:35
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4296; F; F21; F21V; F21V7/00; F21V7/22; F21V9/00; F21V9/04; G01; G01B; G01B11/00; G02B6/0001; G02B6/0005; G02B6/0006; G02B6/4298; G02B6/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
202 words
Optical apparatus for measuring or checking an object, comprising in combination: a support arranged to bear an object to be measured or checked; an optical device arranged to illuminate said object by diascopy or eipscopy with a parallel beam of light; a receiver device comprising a photoelectric element arranged so as to collect at least part of said beam of light emerging from the optical device after said beam of light has illuminated said object by diascopy or by episcopy said receiver device including means for generating a signal responsive to light emanating from the illuminated object; drive means uncontrolled by other elements of the apparatus for causing a relative displacement between said support and said beam of light, said relative displacement being effected in a transverse direction with respect to the portion of the beam of light illuminating said part; at least one pulse generator actuated by said relative displacement and delivering a number of electrical pulses proportional to the relative displacement amplitude; and at least one pulse counter receiving said electrical pulses through an electronic gate opened and closed by the signal generated by said receiver device when its photoelectric element is actuated by light emanating from the illuminated object.
Claim 2
Dependent Claim
202 words
Optical apparatus for measuring or checking an object, comprising in combination: a support arranged to bear an object to be measured or checked; an optical device arranged to illuminate said object by diascopy or eipscopy with a parallel beam of light; a receiver device comprising a photoelectric element arranged so as to collect at least part of said beam of light emerging from the optical device after said beam of light has illuminated said object by diascopy or by episcopy said receiver device including means for generating a signal responsive to light emanating from the illuminated object; drive means uncontrolled by other elements of the apparatus for causing a relative displacement between said support and said beam of light, said relative displacement being effected in a transverse direction with respect to the portion of the beam of light illuminating said part; at least one pulse generator actuated by said relative displacement and delivering a number of electrical pulses proportional to the relative displacement amplitude; and at least one pulse counter receiving said electrical pulses through an electronic gate opened and closed by the signal generated by said receiver device when its photoelectric element is actuated by light emanating from the illuminated object.
Claim 3
Dependent Claim
62 words
Optical apparatus according to claim 1, wherein the optical device comprises a lens and a light source, said light source comprising a light generator located a distance from the object to be measured or checked and a light guide, the input end of which is adjacent said generator and the output end of which is positioned at the focus of said lens.
Claim 4
Dependent Claim
18 words
Apparatus according to claim 2, wherein a diaphragm is disposed at the output end of the light guide.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 3, wherein said lens comprises a concavo-convex lens with a spherical concave surface and a paraboloidic convex surface.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 1, including an enlarging optical system for forming an enlarged image of the illuminated object and an observation screen on which the enlarged image of the object is formed.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 5, including means for illuminating the object by episcopy, comprising a semi-transparent plate behind which a light trap is arranged, the enlarging optical system being arranged upstream of the said semi-transparent plate.
Claim 8
Dependent Claim
35 words
Apparatus according to claim 5, including means for illuminating the object by episcopy, comprising a semi-transparent plate behind which a light trap is arranged, the optical enlarging device being arranged downstream of said semi-transparent plate.
Claim 9
Dependent Claim
42 words
Apparatus according to claim 5, wherein the receiver device comprises a photoelectric cell and a light guide of which the input end starts from a central zone of the observation screen and of which the output end cooperates with said photoelectric cell.
Claim 10
Dependent Claim
35 words
Apparatus according to claim 5, wherein the receiver device comprises a photoelectric cell arranged behind a return mirror, and an orifice is arranged to allow a fraction of the beam of light to pass through.
Claim 11
Dependent Claim
19 words
Apparatus according to claim 1, wherein an amplifying cell is interposed between the photoelectric element and the electronic gate.
Claim 12
Dependent Claim
79 words
Apparatus according to claim 2, arranged to be able to illuminate the object by diascopy or by episcopy, comprising a single light generator connected to two optical devices shielded respectively in cases by means of a light guide which is divided into two arms in an optical fiber divider, said two cases being arranged respectively so as to illuminate the object by a parallel beam of light by diascopy through the support, and by episcopy above the support. Pg,21
Claim 13
Dependent Claim
154 words
Method for measuring or checking an object, comprising the following steps: arranging the object to be measured or checked on a support, illuminating said object by diascopy or by episcopy by a beam of light and then, at least in part, collecting said light in a receiving device comprising a photoelectric element such that a signal is generated by the collected light, causing a relative displacement between said support and said beam of light in a transverse direction with respect to the portion of the beam of light illuminating said object, said displacement being caused in a manner uncontrolled by other process parameters, actuating at least one pulse generator by said relative displacement, said pulse generator delivering a number of electrical pulses proportional to the relative displacement amplitude, and directing these pulses on to at least one pulse counter through an electronic gate opened and closed by the signal generated by said receiver device.
Claim 14
Dependent Claim
154 words
Method for measuring or checking an object, comprising the following steps: arranging the object to be measured or checked on a support, illuminating said object by diascopy or by episcopy by a beam of light and then, at least in part, collecting said light in a receiving device comprising a photoelectric element such that a signal is generated by the collected light, causing a relative displacement between said support and said beam of light in a transverse direction with respect to the portion of the beam of light illuminating said object, said displacement being caused in a manner uncontrolled by other process parameters, actuating at least one pulse generator by said relative displacement, said pulse generator delivering a number of electrical pulses proportional to the relative displacement amplitude, and directing these pulses on to at least one pulse counter through an electronic gate opened and closed by the signal generated by said receiver device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |