Dual-vacuum chamber and dual-frequency phase measurement air refractivity interferometer


Application Number: 00103053
Application Date: 2000.02.25
Publication Number: 1260484
Publication Date: 2000.07.19
Priority Information:
International: G01N21/45
Applicant(s) Name: Qinghua University
Address:
Inventor(s) Name: Yin Chunyong;Wang Zemin;Zhao Chunsheng
Patent Agency Code: 11201
Patent Agent: liao yuanqiu
Abstract The present invention comprises light-splitting plate capable of splitting up the light transmitted by transverse Zeeman laser into two beams and reflecting them, compensating ring set perpendicular to optical axis and 1/4 wave sheet placed in the compensating ring, two length-different vacuum chambers placed between 1/4 wave sheet and right-angle tetrahedral reflector and parallel to optical axis, polarizing reflecting prism and fully-reflecting prism for receiving reflected returning light, two photo-electric delectors and one phaser and data processor connected with phaser. Said invention can raise measuing accuracy and resolution, and can be combined into portable instrument, and possesses self-adaptivity for environmental vibration and drift of optical beam.