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(12) Patent: | (11) CA 1058436 |
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(21) Application Number: | 1058436 |
(54) English Title: | ELONGATED ROD LENS OPTICAL SYSTEM |
(54) French Title: | SYSTEME OPTIQUE ALLONGE AVEC LENTILLES EN FORME DE BATONNETS |
Status: | Term Expired - Post Grant Beyond Limit |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | |
(74) Associate agent: | |
(45) Issued: | 1979-07-17 |
(22) Filed Date: | |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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Abstract of the Disclosure
An optical system for conveying an optical image
having two first biconvex rod lenses arranged end to end on a
common optical axis in spaced relationship, and between said
first rod lenses but not in contact with them a pair of second
rod lenses also arranged end to end on the same axis, the
adjacent ends of the second rod lenses being concave and de-
fining a biconvex cavity which can contain a fluid whereby a
fluid lens is formed, the system being substantially sym-
metrical about a median plane through a biconvex cavity and the
modulus of the reciprocal of the radius of curvature of the
fluid lens being less than or equal to the modulus of the
difference between the reciprocal of the radius of curvature
of the convex surfaces of the first rod lenses adjacent to the
second rod lenses and the reciprocal of the radius of curvature
of the convex surfaces of the second rod lenses adjacent to the
first rod lenses.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 1058436 was not found.
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Description | Date |
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Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: Expired (old Act Patent) latest possible expiry date | 1996-07-17 |
Grant by Issuance | 1979-07-17 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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SECRETARY OF STATE FOR SOCIAL SERVICES IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND |
Past Owners on Record |
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HAROLD H. HOPKINS |