US3628027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam deflecting and focusing means for photoelectric monitoring, counting or control apparatus
Assignee: Sulzer AG
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Filing: 1969-12-17
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Granted: 1971-12-14
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Expires: 1989-12-17
Abstract
Abstract The beam deflecting and focusing system includes a lens member of approximately spherical shape formed of two transparent substantially hemispherical parts as well as a partly reflective partly transparent mirror located in the contact plane between the two hemispherical parts. The mirror is arranged to reflect light from a light source to a reflector outside the lens members and to transmit reflected light from the reflector onto the photocell.
Inventors
- 👤 Gustav Brauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:22
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/14; G02B27/144; G01; G01V; G01V8/00; G01V8/10; G01V8/12; G01V8/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
In combination with a light source, a reflector and a photocell; a beam deflecting and focusing lens and mirror system for photoelectric monitoring, counting or control apparatus comprising a lens member of approximately spherical shape formed of two transparent, substantially hemispherical parts joined and sealed together along a common contact plane and a partly reflective partly transparent mirror within said member located in said contact plane; said lens member having three spherical surface portions thereon for the passage of light therethrough, the first two of said spherical surface portions being pointed respectively towards said light source and said photocell and in symmetrical position one to each other with respect to said mirror, the third spherical surface portion being diametrically opposed to one of said first two surface portions and directed towards said reflector for transmitting and focusing a working light beam from said light source through said lens member onto said reflector and subsequently from said reflector back through said lens member onto said photocell.
Claim 2
Dependent Claim
165 words
In combination with a light source, a reflector and a photocell; a beam deflecting and focusing lens and mirror system for photoelectric monitoring, counting or control apparatus comprising a lens member of approximately spherical shape formed of two transparent, substantially hemispherical parts joined and sealed together along a common contact plane and a partly reflective partly transparent mirror within said member located in said contact plane; said lens member having three spherical surface portions thereon for the passage of light therethrough, the first two of said spherical surface portions being pointed respectively towards said light source and said photocell and in symmetrical position one to each other with respect to said mirror, the third spherical surface portion being diametrically opposed to one of said first two surface portions and directed towards said reflector for transmitting and focusing a working light beam from said light source through said lens member onto said reflector and subsequently from said reflector back through said lens member onto said photocell.
Claim 3
Dependent Claim
49 words
The combination as set forth in claim 1 wherein the surface of said lens member is coated with an opaque light-absorbing material about said three spherical surface portions, each of said surface portions forming a window aperture for transmitting and focusing said working light beam passing through said member.
Claim 4
Dependent Claim
64 words
The combination as set forth in claim 1 wherein said lens member has at least one flat surface portion substantially diametrically opposed to the second one of said first two symmetrical surface portions and disposed in angular relation to the working light beam passing through said lens member, to disperse, attenuate and prevent any unwanted random light from interfering with the working light beam.
Claim 5
Dependent Claim
23 words
The combination as set forth in claim 1 wherein said two hemispherical parts of said lens member are substantially of the same shape.
References Cited (Backward Citations)
US2968228A
Cited
US3263087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |