Patent US3648049A successfully refreshed from Google Patents.
US3648049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dosimeter using a fluorescent glass element
Assignee: Toshiba Corp
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Filing: 1969-06-16
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Granted: 1972-03-07
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Expires: 1989-06-16
Abstract
Abstract This dosimeter comprises a vessel having an inlet slit and outlet slit for ultraviolet rays and a slit for releasing fluorescent light beams which is opened in a direction almost perpendicularly intersecting the direction in which the ultraviolet rays are introduced. In said vessel is housed a trapezoidal fluorescent glass element whose operating plane is exposed to radiation in advance and so positioned as to face the ultraviolet-ray inlet slit and fluorescent light beam release slit and also to be inclined at an angle allowing for the total reflection of ultraviolet rays with respect to the direction in which they are brought in.
Inventors
- 👤 Ryosuke Yokota
- 👤 Yuhei Muto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:59
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
209 words
A dosimeter using a fluorescent glass element which comprises an elongated longitudinal vessel having an inlet slit (4) on one side of the vessel and outlet slit (5) on the other side of the vessel but offset from said inlet slit for ultraviolet rays and a release slit (6) for releasing fluorescent light beams opening in a direction intersecting substantially at right angles the direction in which the ultraviolet rays are brought in; excitation means for supplying exciting ultraviolet rays to said inlet slit; an ultraviolet filter (7) and photon amplifier means (8) for detecting fluorescent light beams carried through said release slit; and a fluorescent glass element (2) having a trapezoidal cross section whose operating plane is so disposed in the vessel as to face the ultraviolet-ray inlet slit and fluorescent light beam release slit and also to be inclined at an angle towards the outlet slit allowing for the total reflection of ultraviolet rays with respect to the direction in which they are introduced, said fluorescent glass element having such an ultraviolet outlet plane as releases the totally reflected ultraviolet rays from the outlet slit in a manner to prevent them from being carried again through the operating plane or opposite plane thereto of said glass element.
Claim 2
Dependent Claim
209 words
A dosimeter using a fluorescent glass element which comprises an elongated longitudinal vessel having an inlet slit (4) on one side of the vessel and outlet slit (5) on the other side of the vessel but offset from said inlet slit for ultraviolet rays and a release slit (6) for releasing fluorescent light beams opening in a direction intersecting substantially at right angles the direction in which the ultraviolet rays are brought in; excitation means for supplying exciting ultraviolet rays to said inlet slit; an ultraviolet filter (7) and photon amplifier means (8) for detecting fluorescent light beams carried through said release slit; and a fluorescent glass element (2) having a trapezoidal cross section whose operating plane is so disposed in the vessel as to face the ultraviolet-ray inlet slit and fluorescent light beam release slit and also to be inclined at an angle towards the outlet slit allowing for the total reflection of ultraviolet rays with respect to the direction in which they are introduced, said fluorescent glass element having such an ultraviolet outlet plane as releases the totally reflected ultraviolet rays from the outlet slit in a manner to prevent them from being carried again through the operating plane or opposite plane thereto of said glass element.
Claim 3
Dependent Claim
25 words
The dosimeter according to claim 1 wherein the ultraviolet outlet plane is formed perpendicular to the direction in which the reflected ultraviolet rays are released.
Claim 4
Dependent Claim
190 words
In a dosimeter using a fluorescent glass element, in combination: an elongated longitudinal vessel having an inlet slit (4) on one side of the vessel and outlet slit (5) on the other side of the vessel but offset from said inlet slit for ultraviolet rays and a release slit for releasing fluorescent light beams opening in a direction intersecting substantially at right angles the direction in which the ultraviolet rays area brought in; excitation means for supplying exciting ultraviolet rays to said inlet slit; and a fluorescent glass element (2) having a trapezoidal cross section whose operating plane is so disposed in the vessel as to face the ultraviolet-ray inlet slit and fluorescent light beam release slit and also to be inclined at an angle towards the outlet slit allowing for the total reflection of ultraviolet rays with respect to the direction in which they are introduced, said fluorescent glass element having such an ultraviolet outlet plane as releases the totally reflected ultraviolet rays from the outlet slit in a manner to prevent them from being carried again through the operating plane or opposite plane thereto of said glass eLement.
Claim 5
Dependent Claim
190 words
In a dosimeter using a fluorescent glass element, in combination: an elongated longitudinal vessel having an inlet slit (4) on one side of the vessel and outlet slit (5) on the other side of the vessel but offset from said inlet slit for ultraviolet rays and a release slit for releasing fluorescent light beams opening in a direction intersecting substantially at right angles the direction in which the ultraviolet rays area brought in; excitation means for supplying exciting ultraviolet rays to said inlet slit; and a fluorescent glass element (2) having a trapezoidal cross section whose operating plane is so disposed in the vessel as to face the ultraviolet-ray inlet slit and fluorescent light beam release slit and also to be inclined at an angle towards the outlet slit allowing for the total reflection of ultraviolet rays with respect to the direction in which they are introduced, said fluorescent glass element having such an ultraviolet outlet plane as releases the totally reflected ultraviolet rays from the outlet slit in a manner to prevent them from being carried again through the operating plane or opposite plane thereto of said glass eLement.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |