Patent US4245160A successfully refreshed from Google Patents.
US4245160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image-intensifier apparatus
Assignee: Toshiba Corp
•
Filing: 1978-12-15
•
Granted: 1981-01-13
•
Expires: 1998-12-15
Abstract
Abstract An image intensifier apparatus which comprises an image intensifier for converting incoming radiation into light rays on an input fluorescent screen, further converting said light rays into electron beams on a photocathode, focusing said light rays by an electron lens system and converting said focused light rays into the visible form by an output screen; and a housing which receives the image intensifier and whose inner side wall is fitted with a radiation leakage-preventing layer and first magnetism shielding layer, and wherein second magnetism-shielding layer having a high radiation permeability is formed on any of those portions of the image intensifier apparatus into which radiation is carried.
Inventors
- 👤 Norio Harao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:32
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/867; H01J31/00; H01J31/08; H01J31/50; H01J31/501
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
An image intensifier apparatus having an input side including an input face for receiving a radiation image, and an output side for generating a visible image, comprising: a magnetic-shielding input window, formed at said input side, including a first magnetic-shielding member covering said input face, for receiving said radiation image therethrough; a radiation-electron conversion input screen mounted at said input side, behind said input window, said input screen including an input substrate, an input fluorescent layer and a photocathode layer; an electron-light conversion output fluorescent screen formed at said output side; and a side wall, constituted by a radiation leakage-preventing member and a second magnetic-shielding member, connecting said input window and said output fluorescent screen.
Claim 2
Dependent Claim
115 words
An image intensifier apparatus having an input side including an input face for receiving a radiation image, and an output side for generating a visible image, comprising: a magnetic-shielding input window, formed at said input side, including a first magnetic-shielding member covering said input face, for receiving said radiation image therethrough; a radiation-electron conversion input screen mounted at said input side, behind said input window, said input screen including an input substrate, an input fluorescent layer and a photocathode layer; an electron-light conversion output fluorescent screen formed at said output side; and a side wall, constituted by a radiation leakage-preventing member and a second magnetic-shielding member, connecting said input window and said output fluorescent screen.
Claim 3
Dependent Claim
24 words
An image intensifier apparatus as in claim 1, wherein said first magnetic-shielding member is made of a nickel-iron alloy having a high magnetic permeability.
Claim 4
Dependent Claim
24 words
An image intensifier apparatus according to claim 2, wherein the thickness of said first magnetic-shielding member is less than or equal to 0.5 mm.
Claim 5
Dependent Claim
123 words
An image intensifier apparatus having an input side including an input face for receiving a radiation image, and an output side for generating a visible image, comprising: a magnetic-shielding input window formed at said input side, including a first magnetic-shielding member covering said input face, for receiving said radiation image therethrough; a radiation-electron conversion input screen mounted at said input side behind said input window, said input screen including an input substrate, an input fluorescent layer and a photocathode layer; an electron-light conversion output fluorescent screen formed at said output side; and a side wall made of a material having a thermal expansion coefficient substantially equal to that of said first magnetic-shielding member and connecting said input window and said output fluorescent screen.
Claim 6
Dependent Claim
123 words
An image intensifier apparatus having an input side including an input face for receiving a radiation image, and an output side for generating a visible image, comprising: a magnetic-shielding input window formed at said input side, including a first magnetic-shielding member covering said input face, for receiving said radiation image therethrough; a radiation-electron conversion input screen mounted at said input side behind said input window, said input screen including an input substrate, an input fluorescent layer and a photocathode layer; an electron-light conversion output fluorescent screen formed at said output side; and a side wall made of a material having a thermal expansion coefficient substantially equal to that of said first magnetic-shielding member and connecting said input window and said output fluorescent screen.
Claim 7
Dependent Claim
39 words
An image intensifier apparatus as in claim 4, further comprising an insert of material for bonding said side wall to said input window, said material having a thermal expansion coefficient substantially equal to that of said first magnetic-shielding member.
Claim 8
Dependent Claim
24 words
An image intensifier apparatus as in claim 4, wherein said first magnetic-shielding member is made of a nickel-iron alloy having a high magnetic permeability.
Claim 9
Dependent Claim
24 words
An image intensifier apparatus as in claim 6, wherein the thickness of said first magnetic-shielding member is less than or equal to 0.5 mm.
Claim 10
Dependent Claim
93 words
An image intensifier apparatus having an input side for receiving a radiation image and an output side for generating a visible image, comprising: a glass input window formed at said input side for receiving said radiation therethrough; a radiation-electron conversion input screen mounted at said input side and including an input substrate, an input fluorescent layer and a photocathode layer, said input substrate comprising a first magnetic-shielding member; an electron-light conversion output fluorescent screen formed at said output side; and a glass side wall connecting said input window and said output fluorescent screen.
Claim 11
Dependent Claim
93 words
An image intensifier apparatus having an input side for receiving a radiation image and an output side for generating a visible image, comprising: a glass input window formed at said input side for receiving said radiation therethrough; a radiation-electron conversion input screen mounted at said input side and including an input substrate, an input fluorescent layer and a photocathode layer, said input substrate comprising a first magnetic-shielding member; an electron-light conversion output fluorescent screen formed at said output side; and a glass side wall connecting said input window and said output fluorescent screen.
Claim 12
Dependent Claim
24 words
An image intensifier apparatus as in claim 8, wherein said first magnetic-shielding member is made of a nickel-iron alloy having a high magnetic permeability.
Claim 13
Dependent Claim
24 words
An image intensifier apparatus according to claim 9, wherein the thickness of said first magnetic-shielding member is less than or equal to 0.5 mm.
References Cited (Backward Citations)
US3809889A
Cited
US4000432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |