Patent ID: 9709789
Date: 2017-07-18
CPC Classifications: G02B,G02F

Claim:
1. An up-conversion infrared microscope arranged for imaging an associated object, wherein the up-conversion infrared microscope 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 microscope, an optical component system being placed on the optical axis between wherein the optical component system comprises: wherein the optical component system is arranged for forming an external image of the back-focal plane of the objective optical component, wherein the external image is formed in an infinity space on the optical axis after the optical component system, wherein during use a bundle of optical paths extend from the associated object, 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 within a distance Dei-nlc from the non-linear crystal given by wherein F is a focal length of the objective optical component, R is a radius of an area of the associated sample which the microscope is arranged for imaging, w n is a refractive index of a medium in the microscope, 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, and wherein the optical component system comprises: