INFRARED UP-CONVERSION TELESCOPE

摘要

There is presented to an up-conversion infrared telescope (110) arranged for imaging an associated scene (130), wherein the up-conversion infrared telescope (110) comprises a non-linear crystal (120) arranged for up-conversion of infrared electromagnetic radiation, and wherein a first optical component (101) has an entrance pupil with a first diameter D 1, and an optical component system which is arranged for forming an first image (136) of the back-focal plane (132) of the objective optical component (100), which has a diameter (given by the diameter of a circle enclosing all optical paths at the plane of the external image) which is denominated D2 and wherein D1 is larger than a second diameter D2 and wherein the telescope further comprises a third optical component (103) and a fourth optical component (104) arranged for re-imaging the first image into a second image of the back-focal plane (132) of the first optical component (101).

主权项

1. An up-conversion infrared telescope arranged for imaging an associated scene, wherein the up-conversion infrared telescope comprises
a non-linear crystal arranged for up-conversion of infrared electromagnetic radiation, the non-linear crystal being placed on an optical axis of the telescope, an optical component system being placed on the optical axis between
an associated plane suitable for comprising the associated scene, andthe non-linear crystal, wherein the optical component system comprises:
a primary optical component subsystem comprising:
a first optical component anda second optical component, wherein the first optical component and the second optical component, are each arranged for forming a phase-conserving image of the back focal plane of, respectively, the second optical component and the first optical component, wherein the first optical component has an entrance pupil with a first diameter, a secondary optical component subsystem comprising:
a third optical component anda fourth optical component, wherein the third optical component and the fourth optical component, are each arranged for forming a phase-conserving image of the back focal plane of, respectively, the fourth optical component and the third optical component,
wherein the optical component system is arranged for forming an external image of the back-focal plane of the first optical component, wherein the external image is formed in an infinity space on the optical axis after the optical component system, wherein a bundle of optical paths may extend from the associated scene during use, via the entrance pupil through the optical component system, and through the non-linear crystal, and wherein the non-linear crystal is placed so that the external image is situated within the non-linear crystal or in the immediate vicinity of the non-linear crystal, and wherein an intersection between the bundle of optical paths and a plane comprising the external image defines an area with a second diameter, and wherein the first diameter is larger than the second diameter.