Design method and device of dark field condenser for metallographic microscope

• Main Authors: MEI JIAJUN, CHEN JIANAN, ZHOU QINGHONG, HU YIN, HE KAI, HONG DONGFANG, GAO-ZHOU LINER, XIAO YANG, LI FANGYUAN, ZHANG YANKE
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses a design method and device of a dark field condenser for a metallographic microscope, and the method comprises the steps: drawing a design image in a drawing of drawing software based on the objective lens parameters of a to-be-designed metallographic microscope; drawing at least two parallel light rays parallel to the optical axis of the system in the design image, calculating a convergence point of the parallel light rays according to a preset boundary condition, and generating divergent light rays passing through the convergence point according to the dark field light illumination range; determining intersection points of the divergent light and the parallel light, and generating a reflection paraboloid curve through fitting according to the intersection points; and rotating the reflection paraboloid curve by taking the system optical axis as the axis, and determining the dark field condensing lens surface. According to the invention, an integrated design thought is realized, the wh