Patent US1532968A successfully refreshed from Google Patents.
Patent US3989948A successfully refreshed from Google Patents.
US3989948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual beam optical system
Assignee: Instrumentation Specialties Co
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Filing: 1975-06-09
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Granted: 1976-11-02
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Expires: 1995-06-09
Abstract
Abstract To compensate for variations in the intensity of light emitted from different locations within a lamp or in different directions from the lamp, a flat, thin, radiating member is positioned to receive intense light from the lamp and to radiate two divergent beams of light with proportional intensities in directions transverse to the member through collimating means oriented on the same light radiating spot. Light from the lamp, in one embodiment, is focused onto a spot on the side of the radiating member opposite the collimating means with an ellipsoidal reflector and, in another embodiment, the required intensity is obtained by positioning a lamp near the side of the radiating member opposite the collimating means.
Inventors
- 👤 Robert William Allington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:35
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/255
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
198 words
Apparatus for directing light from a light source into a plurality of paths, comprising: a light member having first and second surfaces; said light-radiating member being positioned to receive light from said light source with substantial light intensity on at least a first spot on said first surface of said light-radiating member; said light-radiating member being capable of passing light from said first spot on said first surface to a second spot on said second surface, whereby a substantial amount of light is radiated from said second spot by said light-radiating member; said light-radiating member including light-radiating means for radiating light along at least a first and a second of said paths from said second spot in response to said light from said light source with a substantially constant ratio of the intensity of the light in said first path to the intensity of the light in said second path, which ratio is substantially independent of fluctuations in the light of said light source; light-beam-forming means for transmitting light from the second spot on said light-radiating member into said plurality of paths; said light-beam-forming means being on the opposite side of said light-radiating member from said first spot.
Claim 2
Dependent Claim
198 words
Apparatus for directing light from a light source into a plurality of paths, comprising: a light member having first and second surfaces; said light-radiating member being positioned to receive light from said light source with substantial light intensity on at least a first spot on said first surface of said light-radiating member; said light-radiating member being capable of passing light from said first spot on said first surface to a second spot on said second surface, whereby a substantial amount of light is radiated from said second spot by said light-radiating member; said light-radiating member including light-radiating means for radiating light along at least a first and a second of said paths from said second spot in response to said light from said light source with a substantially constant ratio of the intensity of the light in said first path to the intensity of the light in said second path, which ratio is substantially independent of fluctuations in the light of said light source; light-beam-forming means for transmitting light from the second spot on said light-radiating member into said plurality of paths; said light-beam-forming means being on the opposite side of said light-radiating member from said first spot.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1 in which said light-radiating member is a frosted ultraviolet transparent material.
Claim 4
Dependent Claim
15 words
Apparatus according to claim 1 in which said light-radiating member is devitrified high silica glass.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 in which said light-radiating member is polycrystalline aluminum oxide.
Claim 6
Dependent Claim
38 words
Apparatus according to claim 1 further including at least first and second photocells, said first photocell being positioned in one of said plurality of paths and said second photocell being positioned in another of said plurality of paths.
Claim 7
Dependent Claim
81 words
Apparatus according to claim 1 in which: said light source includes focusing means for focusing light from said light source onto a spot on said light-radiating member, whereby a substantial amount of light is radiated by said light-radiating member; said focusing means including an ellipsoidal reflector having first and second foci; said light-radiating member being located in said first focus of said ellipsoidal reflector; and said light source including means for emitting light from said second focus of said ellipsoidal reflector.
Claim 8
Dependent Claim
25 words
Apparatus according to claim 6 in which: said light-radiating member is a passive light-radiating means; said passive light-radiating means includes means for substantially diffusing light.
Claim 9
Dependent Claim
43 words
Apparatus according to claim 6 in which: said light-radiating member is a fluorescent means for emitting light at a first frequency when impinged upon by light having a second frequency; and said light source includes means for emitting light of said second frequency.
Claim 10
Dependent Claim
26 words
Apparatus according to claim 1 in which: said light-radiating member is a passive light-radiating means; and said passive light-radiating means includes means for substantially diffusing light.
Claim 11
Dependent Claim
38 words
Apparatus according to claim 9 further including at least first and second photocells, said first photocell being positioned in one of said plurality of paths and said second photocell being positioned in another of said plurality of paths.
Claim 12
Dependent Claim
18 words
Apparatus according to claim 9 in which said apparatus further includes means for removably mounting said light-radiating member.
Claim 13
Dependent Claim
29 words
Apparatus according to claim 9 in which said light-beam-forming- means includes light-collimating means for collimating light from the same spot on said light-radiating member into said plurality of paths.
Claim 14
Dependent Claim
68 words
Apparatus according to claim 12 in which said light collimating means includes: light detecting means for providing an electrical signal in response to light from said light-radiating member; and flow-cell means having internal walls forming a flow path for fluids: said light detecting means and flow-cell means including aperture stops forming straight-line light paths from said one spot through said flow-cell means and into said light detecting means.
Claim 15
Dependent Claim
18 words
Apparatus according to claim 1 in which said light-radiating member is a thin tetrafluoroethylene member having light-diffusing properties.
Claim 16
Dependent Claim
23 words
Apparatus according to claim 14 in which said tetrafluoroethylene member includes selective light-absorbing material, whereby said member filters light from said light source.
Claim 17
Dependent Claim
16 words
Apparatus according to claim 14 in which said tetrafluoroethylene member is formed of fused tetrafluoroethylene particles.
Claim 18
Dependent Claim
77 words
Apparatus according to claim 14 in which said light source includes: focusing means for focusing light onto a spot on said light-radiating member, whereby a substantial amount of light is radiated by said light-radiating member; said focusing means including an ellipsoidal reflector having first and second foci; said light-radiating member being located in said first focus of said ellipsoidal reflector; and said light source including means for emitting light from said second focus of said ellipsoidal reflector.
Claim 19
Dependent Claim
29 words
Apparatus according to claim 1 in which said light-beam-forming means includes light-collimating means for collimating light from the same spot on said light-radiating member into said plurality of paths.
Claim 20
Dependent Claim
18 words
Apparatus according to claim 18 in which said light-radiating member is a thin tetrafluoroethylene member having light-diffusing properties.
Claim 21
Dependent Claim
16 words
Apparatus according to claim 18 in which said light-radiating member is a frosted ultraviolet transparent material.
Claim 22
Dependent Claim
15 words
Apparatus according to claim 18 in which said light-radiating member is devitrified high silica glass.
Claim 23
Dependent Claim
14 words
Apparatus according to claim 18 in which said light-radiating member is polycrystalline aluminum oxide.
Claim 24
Dependent Claim
81 words
Apparatus according to claim 18 in which said light source includes: focusing means for focusing light from said light source onto a spot on said light-radiating member, whereby a substantial amount of light is radiated by said light-radiating member; said focusing means including an ellipsoidal reflector having first and second foci; said light-radiating member being located in said first focus of said ellipsoidal reflector; and said light source including means for emitting light from said second focus of said ellipsoidal reflector.
Claim 25
Dependent Claim
68 words
Apparatus according to claim 18 in which said light collimating means includes: light detecting means for providing an electrical signal in response to light from said light-radiating member; and flow-cell means having internal walls forming a flow path for fluids; said light detecting means and flow-cell means including aperture stops forming sraight-line light paths from said one spot through said flow-cell means and into said light detecting means.
Claim 26
Dependent Claim
81 words
Apparatus according to claim 24 in which said light source includes: focusing means for focusing light from said light source onto a spot on said light-radiating member, whereby a substantial amount of light is radiated by said light-radiating member; said focusing means including an ellipsoidal reflector having first and second foci; said light-radiating member being located in said first focus of said ellipsoidal reflector; and said light source including means for emitting light from said second focus of said ellipsoidal reflector.
Claim 27
Dependent Claim
75 words
Apparatus according to claim 24 in which: said plurality of light-radiating members include at least first and second interchangeable light-radiating members; said first light-radiating member being a passive light-radiating means for substantially diffusing light from the light source and said second light-radiating member being a fluorescent means for emitting light at a first frequency when impinged upon by light having a second frequency, said light source including means for emitting light of said second frequency.
Claim 28
Dependent Claim
43 words
Apparatus according to claim 1 in which: said light-radiating member is a fluorescent means for emitting light at a first frequency when impinged upon by light having a second frequency; and said light source includes means for emitting light of said second frequency.
Claim 29
Dependent Claim
38 words
Apparatus according to claim 27 further including at least first and second photocells, said first photocell being positioned in one of said plurality of paths and said second photocell being positioned in another of said plurality of paths.
Claim 30
Dependent Claim
18 words
Apparatus according to claim 27 in which said apparatus further includes means for removably mounting said light-radiating member.
Claim 31
Dependent Claim
75 words
Apparatus according to claim 27 in which: said plurality of light-radiating members include at least first and second interchangeable light-radiating members; said first light-radiating member being a passive light-radiating means for substantially diffusing light from the light source and said second light-radiating member being a fluorescent means for emitting light at a first frequency when impinged upon by light having a second frequency, said light source including means for emitting light of said second frequency.
Claim 32
Dependent Claim
22 words
Apparatus according to claim 27 in which said light-radiating member includes means for blocking light having a wavelength substantially of 254 nanometers.
Claim 33
Dependent Claim
66 words
Apparatus according to claim 31 further including: a plurality of photocells; said photocells being sensitive to a predetermined frequency; different ones of said photocells being mounted in line with different ones of said filters and said paths; and said filters including means for providing light of said predetermined frequency to said photocells in response to light substantially in the wavelength range of 250 to 290 nanometers.
Claim 34
Dependent Claim
29 words
Apparatus according to claim 27 in which said light-beam-forming means includes light-collimating means for collimating light from the same spot on said light-radiating member into said plurality of paths.
Claim 35
Dependent Claim
67 words
Apparatus according to claim 33 in which said light collimating means includes: light detecting means for providing an electrical signal in response to light from said light-radiating member; and flow-cell means having internal walls forming a flow path for fluids; said light detecting means and flow-cell means including aperture stops forming straight-line paths from said one spot through said flow-cell means and into said light detecting means.
Claim 36
Dependent Claim
16 words
Apparatus according to claim 27 in which said light-radiating member includes means for substantially diffusing light.
Claim 37
Dependent Claim
18 words
Apparatus according to claim 35 in which said means for substantially diffusing light comprises a plurality of particles.
Claim 38
Dependent Claim
63 words
Apparatus according to claim 36 in which: said plurality of particles comprise fluorescent means for emitting light at a first frequency when impinged upon by light having a second frequency; said light source including means for emitting light of said second frequency, whereby diffused light of said second frequency and fluorescent light of said first frequency are directed along said plurality of paths.
Claim 39
Dependent Claim
54 words
Apparatus according to claim 37 further including: a plurality of interchangeable filter mounting means; each of said interchangeable filter mounting means being mounted in a different one of said plurality of paths; and said filter mounting means being adapted to receive filters blocking a selected one of said first and second frequencies of light.
Claim 40
Dependent Claim
35 words
Apparatus according to claim 38 in which said fluorescent means comprises means for emitting light having a wavelength substantially in the range of 270 to 290 nanometers, and said light source is an ultraviolet lamp.
Claim 41
Dependent Claim
18 words
Apparatus according to claim 1 in which said apparatus further includes meams for removably mounting said light-radiating member.
Claim 42
Dependent Claim
24 words
Apparatus according to claim 40 in which said mounting means includes means for selectively mounting any one of a plurality of different light-radiating members.
Claim 43
Dependent Claim
75 words
Apparatus according to claim 41 in which: said plurality of light-radiating members include at least first and second interchangeable light-radiating members; said first light-radiating member being a passive light-radiating means for substantially diffusing light from the light source and said second light-radiating member being a fluorescent means for emitting light at a first frequency when impinged upon by light having a second frequency, said light source including means for emitting light of said second frequency.
Claim 44
Dependent Claim
23 words
Apparatus according to claim 42 further including light filter means for passing light having wavelength over the range of 250 through 285 nanometers.
Claim 45
Dependent Claim
14 words
Apparatus according to claim 42 in which said fluorescent means absorbs 254 nanometers light.
Claim 46
Dependent Claim
18 words
Apparatus according to claim 44 in which said fluorescent means emits light substantially within 270 to 290 nanometers.
Claim 47
Dependent Claim
13 words
Apparatus according to claim 45 in which said light filters are not interchangeable.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |