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EP0266005A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Mirror objective and optical arrangement comprising two mirror objectives

Assignee: Koninklijke Philips NV
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Filing: 1987-10-26
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Granted: —
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Expires: 2007-10-26
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Abstract

Abstract Mirror objective comprising two reflecting surfaces (2, 3), a primary mirror and a secondary mirror, respectively, arranged in connection to a lens (1). The primary mirror and the secondary mirror together with the lens are arranged to form an excentric radiation path through the mirror objective. The optical axis of the mirror objective follows an N-shaped path through the objective and central diaphragming is avoided. The object and consequently the image are situated outside the geometrical axis of the mirror objective. The mirror objective shows a short distance between the object and the image and is, for example, suitable for reading bar symbols, letters and digits, and for reading optical discs or similar storage means. The invention also relates to an optical arrangement com­prising two mirror objectives as described above, one of the mirror objectives being used for illuminating, the other mirror objective being used for imaging.

Inventors

  • 👤 Georg Vogl

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 18:16
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0856; G02B17/086; G02B17/0804; G02B17/0812; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10554; G06K7/10594; G06K7/10683; G06K7/10702; G11; G11B; G11B7/00; G11B7/12

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 144 words
A monolithic mirror objective comprising a lens having a first mirror, primary mirror, arranged in connect­ion with the output surface of the lens and a second mirror, secondary mirror, arranged in connection with the input surface of the lens, the mirrors in cooperation with the lens being arranged to form an N-shaped radiation path through the mirror objective, characterized in that the first mirror is arranged to cover the central part of the output surface, while the second mirror is arranged to cover a part of the input surface which is displaced aside relative to the center of the input surface, so that the first mirror and the second mirror together with the lens and possible further lenses can follow excentrically running, N-shaped path through the objective, the object and the image situated on each side of the geometrical axis of the mirror objective.
Claim 2
Dependent Claim 144 words
A monolithic mirror objective comprising a lens having a first mirror, primary mirror, arranged in connect­ion with the output surface of the lens and a second mirror, secondary mirror, arranged in connection with the input surface of the lens, the mirrors in cooperation with the lens being arranged to form an N-shaped radiation path through the mirror objective, characterized in that the first mirror is arranged to cover the central part of the output surface, while the second mirror is arranged to cover a part of the input surface which is displaced aside relative to the center of the input surface, so that the first mirror and the second mirror together with the lens and possible further lenses can follow excentrically running, N-shaped path through the objective, the object and the image situated on each side of the geometrical axis of the mirror objective.
Claim 3
Dependent Claim 51 words
A mirror objective as claimed in Claim 1, characterized in that an input slot is disposed in front of the input surface and an output slot is disposed after the output surface in order to together with the shaping of the mirrors delimit the radiation beam passing through the mirror objective.
Claim 4
Dependent Claim 31 words
A mirror objective as claimed in Claim 1, characterized in that a further lens is disposed adjacent to said lens, one of the reflecting surfaces being enclosed between the two lenses.
Claim 5
Dependent Claim 28 words
A mirror objective as claimed in any one of the preceding Claims, characterized in that a collimator lens is disposed near the object plane of the mirror objective.
Claim 6
Dependent Claim 61 words
An optical arrangement comprising two mirror objectives as claimed in any one of the preceding Claims, characterized in that the two mirror objectives are arranged with parallel geometrical axes and adjacent to each other, and in that one of the mirror objectives is used for illuminating an object while the other mirror objective is used for imaging the object in question.

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