https://wiki.yanding.com/ 2026-08-25T08:02:26+00:00 https://wiki.yanding.com/ https://wiki.yanding.com/lib/tpl/myconfluence/images/favicon.ico text/html 2026-07-10T08:03:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:collimators:focal_length_matching&rev=1783670589&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Focal Length Matching Between Collimator and DUT When testing a DUT using a collimator, the collimating objective Lcol of the collimator and the imaging objective Ldut of the DUT form an optical imaging system. The image of the target formed by Lcol serves as the object for Ldut. Focal length is one of the primary parameters of Lcol. In collimator se… text/html 2026-07-10T08:03:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:collimators:object_distance_calculation&rev=1783670590&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Object Distance Calculation for Collimators Collimators are designed with infinity as the target object distance, but in practical applications, the object distance that yields the sharpest image of the DUT may be finite. According to the principles of lens imaging, when the target is located outside or inside the focal plane of the collimating objec… text/html 2026-08-07T02:22:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:collimators:pupil_matching&rev=1786069320&do=diff Collimator–DUT Pupil Matching The exit pupil (ExP) is the image of the aperture stop formed by the optical elements that lie between the stop and the image plane. It serves as the common opening through which all rays leave the optical system, and its centre is located at the intersection of the chief rays in image space. text/html 2026-07-28T06:15:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:collimators:structure&rev=1785219324&do=diff Collimator Structure With the increasing use of digital cameras in road vehicles, aircraft, head-mounted displays, and security systems, the testing and calibration of cameras targeting distant objects has become essential in development, production, and validation. Whether constrained by the limited space of an optical laboratory or the compact footprint of automated production equipment, the collimator is the inevitable choice for simulating distant targets within a confined physical space.