Lateral surface sensor and imaging lens system therefor

Details Lateral surface sensor and imaging lens system therefor Lateral surface sensor and imaging lens system therefor

G - Physics

01

B

G01B 11/24 (2006.01) G01N 21/88 (2006.01) G01N 21/90 (2006.01) G01N 21/952 (2006.01) G01N 21/89 (2006.01)

Patent

CA 2517633

The invention relates to an imaging lens system for imaging circular lateral surfaces (9) of an object (10) onto an imaging plane, comprising a reflecting element (6) and a first angle-reducing element (3,17) which is arranged behind the reflecting element and which reduces the angle between a light beam emanating from the object (10) and the optical axis (12). The aim of the invention is to produce an imaging lens system for imaging circular side surfaces, which is easy to produce and which can be produced at low cost, in addition to exhibiting a large acceptance angle for incident radiation and being tolerant in relation to inaccurate positioning of the object. According to the invention, a second angle-reducing element (13) is arranged upstream from the reflecting element (6) in the direction of radiation. Said second element reduces the angle between a light beam (1,1) emanating from the object (10) and the optical axis (12).

L'invention concerne une optique de reproduction destinée à la représentation des surfaces latérales circulaires (9) d'un objet (10) sur un plan de reproduction, optique comprenant un élément réfléchissant (6), et un premier élément réducteur angulaire (3, 17) disposé, dans le sens des rayons, en aval de l'élément réfléchissant, lequel réduit l'angle entre un rayon lumineux sortant de l'objet (10) et l'axe optique (12). L'invention a pour but d'obtenir une optique de reproduction du type précité qui, d'une part, soit de fabrication simple et économique et, d'autre part, présente un grand angle accepteur pour les rayons incidents, tout en ayant une tolérance pour un positionnement imprécis de l'objet. A cet effet, l'invention est caractérisée en ce qu'un second élément réducteur angulaire (13) est disposé, dans le sens des rayons, en amont de l'élément réfléchissant (6), ledit second élément réduisant l'angle entre un rayon lumineux (11) sortant de l'objet (10) et l'axe optique (12).

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