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Critical angle method for measuring plane Introduction


n1 after the incident critical angle prism for the Gd =} emitted by the critical angle prism can be calculated in Figure 4. ● tm 1O a boudoir of a 4 if the number of internal reflection in the mirror as Ⅳ, the offset from the ‰ 0f the ,,;,[link widoczny dla zalogowanych],-: easy to prove:; i million = (2N a 1) 1, n (a Gd) - Yun by the formula: one out of the fire-y = y. + FD () by the almost Gaussian distribution of light intensity (Shenzhen) = I. cl. l-exp [a)] l that it is symmetrical. So, when the defocus amount of e,[link widoczny dla zalogowanych], spot displacement. =, (E), and ignore the light intensity change and hope candidate points set measured reflectivity of the surface constant, that is,) = constant, then the two-quadrant photodetector intensity suffered foot l1I respectively t = (x a.,[link widoczny dla zalogowanych],) ・ p, (一 0, ') dsW-2 = f1, (a.,[link widoczny dla zalogowanych], p (a yo, y) ds under which they can calculate the difference: = / j /-l a This is the displacement corresponding to different light intensity difference. If the light intensity difference may be measured to ascertain surface displacement by guillotine. Similarly, when the light intensity difference is zero, it indicates that the measured surface in the target state. According to the above formula , can be calculated and measured surface defocus optical probe of the system 'Dam 4 receives the signal intensity difference between the amount of defocus based on ± 0.O001mm,[link widoczny dla zalogowanych], the corresponding relationship shown in Table l three experiments to prove calculation principle and developed the system to obtain reliable data, the experimental results of experimental and calculated indole can be seen in Figure 5. are consistent with the results of four, the conclusion 1. by measuring critical angle, the axis on both sides light intensity difference near zero rate of change in the maximum pp {0.20.1-l0 ~ 6-2/2610J- a 01_ volume Figure 62. When the larger amount of defocus, the worse the linearity can be shown that only In 10} <i0.O1Hm only within the linear 3. The system can achieve small displacement measurement. also be used for precision measurement of the positioning and targeting. This teaching aid by Liangjin Wen Xing Huo account the guidance and teacher Taiwan for. grateful. [to] the formation of the variable refers to the geometric characteristics of the formation of surface variables, see the rate of s & le88 No. 5 hole with a mathematical model of East New York location of measurement error message Cliff acres color test equipment port in east China Measurement Technology Conference held in Qingdao to improve the TV quality. East of Metrology, CHINA radio Collaborative Group on March 26, 1989 ~ shrews, held at Qingdao, East China TV Test Equipment Measurement Technology Conference. This is our TV industry for the first time on the measurement of TV test equipment control seminar scheduled to work. East China National Centre of Metrology and six provinces and one city from East guillotine test measurement technology and other institutions and barnyard TV plant a total of 24 units of 36 Ding meeting representatives Measurement Bureau, Shandong Province led to the meeting and spoke, the delegates also visited the Qingdao TV Factory. The participants first heard wrong about the status of preparations for the introduction workshop. and then to share the small color TV test equipment of the unit standards The metrological verification work, and the ship under the national standard GB 86 - $ 1, the amount of color television broadcasting receivers guillotine method detection capabilities and the corresponding requirements on the electrical, optical test equipment and the corresponding acoustic Lou analyzed and categorized test equipment. made the following working hypotheses: 1. the national standard in the 61 parameters included in the TV into the measuring instruments required for the corresponding transmission range of the amount of legal management. for failure to develop protocols and delivery systems are proposed regional planning .2. made some special equipment to open the preparation of procedures and test projects I 3.. on the color TV test technology in supporting the devices or methods required McNair out special projects, including for some projects. such as regional cooperation are hard to solve, can be reported to the higher measurement department. guillotine TV trial participants that the unity of equipment and its value will directly affect the quality of color. So. the color TV test equipment measurement pick set into national law Ba management track is an extremely urgent need to address the problem. through discussions and exchanges made regional cooperation work proposal for the East China TV quality improvement and consistent color TV sorrowful volume method of the national standard over to a catalytic role . (Pei-) ~ Strong one by one one by one bad one meal a w Qiu handsome carp iv rubidium Can a Ⅲ Ⅲ and one by one chi chi c c c c n in a, a: m concave one by one when Peter sings tons Qin muscle weight I. l foment iv iv iv sampan sampan sampan Shan removed one by one 00c; a coke ... Lan delete a n a w of note .~..... table one by one ix iv iv iv iv iv iv one by one

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