Translator Disclaimer
28 November 2007 Equipment for 2D profile measuring of aspheric microscope condenser in mass production
Author Affiliations +
This paper deals with the measurement of aspherics on surfaces of microscope condenser in mass production. The aspheric surface in microscope condenser is a kind of optical surface working under very large numerical aperture and small field of view. To fulfill Kohler illumination for the microscope condenser, the aspheric surface must be fabricated as well as designed capable of projecting an image of the source, large enough to fill the sub stage condenser of the microscope. For larger numerical aperture condenser fabrication, it is crucial to guarantee a reasonable aspheric profile for spherical aberration compensation and even illumination. Here we established the equipment for microscope condenser aspheric profile measuring in mass production. The industry microscope is reconstructed to image the profile, with LED panel light source for even backlighting. The profile, captured with a high resolution CCD, is processed. It can be compared with theoretic aspheric profile directly or interpolated with a predefined polynomial. In this method, supports for aspheric lens fabrication and measurement are designed and employed on the industry microscope. It guaranteed that a table of points can accurately describe the profile of the aspheric surface, introducing less assembling error. Measurement with this method has proved satisfactory for certain high aperture microscope condenser at low cost. For systems requiring still higher accuracy, the CCD resolution may have to be increased and interpolation method optimized accordingly but the online aspheric testing equipment with proper supports could surely improve the accuracy of aspheric surface fabrication at low cost.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xuemin Cheng, Jianshe Ma, and Yi Zhang "Equipment for 2D profile measuring of aspheric microscope condenser in mass production", Proc. SPIE 6834, Optical Design and Testing III, 68343L (28 November 2007);


Measurement system of tiny angle based on LED
Proceedings of SPIE (November 15 2011)
A correction method on system error in null mirror during...
Proceedings of SPIE (January 16 2019)
RGB LED with smart control in the backlight and lighting
Proceedings of SPIE (February 15 2008)
Macro lens for emission microscopy
Proceedings of SPIE (August 11 1995)
Video imaging in flow a novel method for...
Proceedings of SPIE (February 15 1994)

Back to Top