Photographic shot lens - has variable focus for compact cameras, producing photographs of 24 x 36 mm

In the light direction along the optical axis (O-O') the following are arranged one after the other: a convex meniscus lens with radii (r1,r2) and a specific thickness (d1); after a space (11) is a biconcave lens with radii (r3,r4) and a specific thickness (d2); then follows after a distance (1...

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Bibliographische Detailangaben
Hauptverfasser: MAENZ, HARALD, O-6900 JENA, DE, SCHMOELLER, CHRISTINE, O-6908 JENA, DE
Format: Patent
Sprache:eng ; ger
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Beschreibung
Zusammenfassung:In the light direction along the optical axis (O-O') the following are arranged one after the other: a convex meniscus lens with radii (r1,r2) and a specific thickness (d1); after a space (11) is a biconcave lens with radii (r3,r4) and a specific thickness (d2); then follows after a distance (12) a convex meniscus lens with radii (r5,r6) and a specific thickness (d3). After a further distance (13) follows a positive bond component with radii (r7,r8,r9) and specific thicknesses (d4,d5). Such lenses form the first optical working group (I), the refraction force of which is positive. At a further distance (14) which is variable and which contains a shutter, follows a second optical working group (II) with negative refraction force, formed by a biconvex lens with specific radii (r10,r11) and thickness (d6), and at a distance (15) is a biconcave lens with specific radii (r12,r13) and thickness (d7). At a further distance (16) is a concave meniscus lens with specific radii (r14,r15) and thickness (d8). USE - As a photographic lens arrangement with variable focus for use in a compact camera.