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GB190607661A - Improvements in certain Photographic Lenses. - Google Patents

Improvements in certain Photographic Lenses.

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Publication number
GB190607661A
GB190607661A GB190607661DA GB190607661A GB 190607661 A GB190607661 A GB 190607661A GB 190607661D A GB190607661D A GB 190607661DA GB 190607661 A GB190607661 A GB 190607661A
Authority
GB
United Kingdom
Prior art keywords
photographic lenses
certain photographic
lenses
certain
anastigmatic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
Harold Dennis Taylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB190607661A publication Critical patent/GB190607661A/en
Expired legal-status Critical Current

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Abstract

7661. Taylor, H. D. March 30. Drawings to Specification. Lenses.-Relates to improvements on the lenses described in Specifications Nos. 22,607, A.D. 1893, and No. 15,107, A.D. 1895. With the object of increasing the angular valve of the flat anastigmatic field, the separation and radii of the second and third surfaces are modified in a way set out in the Specification.
GB190607661D 1906-03-30 1906-03-30 Improvements in certain Photographic Lenses. Expired GB190607661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190607661T 1906-03-30

Publications (1)

Publication Number Publication Date
GB190607661A true GB190607661A (en) 1907-03-14

Family

ID=32545238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190607661D Expired GB190607661A (en) 1906-03-30 1906-03-30 Improvements in certain Photographic Lenses.

Country Status (1)

Country Link
GB (1) GB190607661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544864A (en) * 1946-10-05 1951-03-13 Tham Percy Harry Camera having curved film plane to eliminate distortion
US2663222A (en) * 1951-02-23 1953-12-22 Farrand Optical Co Inc Three-element objective lens with reduced spherical aberration and chromatic difference of spherical aberration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544864A (en) * 1946-10-05 1951-03-13 Tham Percy Harry Camera having curved film plane to eliminate distortion
US2663222A (en) * 1951-02-23 1953-12-22 Farrand Optical Co Inc Three-element objective lens with reduced spherical aberration and chromatic difference of spherical aberration

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