Claims
- 1. A high speed catadioptric objective system lens consisting of:
- a positive front lens with the front surface radius being smaller than the rear surface radius;
- a negative meniscus lens on the image side of said positive front lens with the back surface being convex toward the image and provided with a mirrored portion surrounding a light permeable central portion;
- a positive lens cemented onto the front surface central portion of said negative meniscus lens; and
- a counter mirror applied to the central portion of said positive front lens.
- 2. A high speed catadioptric objective system lens consisting of:
- a positive front lens with the front surface radius being smaller than the rear surface radius;
- a negative meniscus lens on the image side of said positive front lens with the back surface being convex toward the image and provided with a mirrored portion surrounding a light permeable central portion;
- a positive cemented pair cemented onto the front surface central portion of said negative meniscus lens; and
- a counter mirror applied to the central portion of said positive front lens.
- 3. A catadioptric system lens according to claim 1 or 2 wherein the rear surface of said positive front lens is convex toward the image, said counter mirror being applied to the central portion of said rear surface.
- 4. A high speed catadioptric objective system lens consisting of:
- a positive front lens with the front surface radius being smaller than the rear surface radius;
- a negative meniscus lens on the image side of said positive front lens with the back surface being convex toward the image and provided with a mirrored portion surrounding a light permeable central portion;
- a positive lens cemented onto the front surface central portion of said negative meniscus lens;
- a counter mirror surfaced to the front surface central portion of said positive front lens; and
- a negative lens cemented onto the back surface central portion of said positive front lens.
- 5. A high speed catadioptric objective lens consisting of:
- a positive front lens with the front surface radius being smaller than the rear surface radius;
- a negative meniscus lens on the image side of said positive front lens with the back surface being convex toward the image and provided with a mirrored portion surrounding a light permeable central portion;
- a positive lens cemented onto the front surface central portion of said negative meniscus lens; and
- a negative lens with a counter mirror silvered onto its object side surface, the negative lens cemented onto the central portion of the central portion of the surface toward the image of said positive front lens.
Priority Claims (1)
Number |
Date |
Country |
Kind |
015052/77 |
Dec 1977 |
CHX |
|
Parent Case Info
This is a continuation, of application Ser. No. 967,973 filed Dec. 8, 1978, now abandoned.
US Referenced Citations (6)
Continuations (1)
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Number |
Date |
Country |
Parent |
967973 |
Dec 1978 |
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