英文版课程设计.docVIP

Optical General Design Viewing telescope University:Changchun University Of Science and Technology Faculty: Photoelectric Engineering Number: 090211142 Name: Ma Yingying 2011 . 12 . 10 The requirements of the design: Viewing telescope i. Full field of view: ii. The diameter of exit pupil: iii. The eye relief: iv. The resolving power: v. The vignetting coefficient: vi. The distance between the emitting surface of prism and reticle: vii.Prism and material: roof prism(k=3.552);material:Bak7 viii. Eyepiece:2-35 II. The calculation of eyepiece Eyepiece is an important part of microscope and telescope,so it is with viewing telescope.But eyepiece itself doesnt need designing. When we have to use an eyepiece, we just have to choose the corresponding type according to the technical requirement. i. The eyepiece has been given in the question. We can find it on P299 in the handbook of optical design, as shown in the figure below. The structure of eyepiece 2-35 Apart from these figures, the handbook also provides the parameter of structure and the main datas of optical system:,,,. is the distance between the last surface and F ′ . Parameter of eyepiece 2-35 r d V 108.65 -33.31 108.65 21.81 -41.72 24.91 -24.91 33.31 6 0.2 2 11.5 0.2 13.5 2.5 1.5163 1.6199 1.5163 1.5163 1.6199 64.1 36.3 64.1 64.1 36.3 27.4 28.3 29.4 29.7 30.2 29.3 26.7 23.3 From the chart, we know that the exit pupil is on the left of the optical system. In most cases, the exit pupil is on the right. The eyepiece seems to be reversed. So we cant use these datas directly. ii. Reverse the eyepiece given in the handbook. For the eyepiece is reversed, the data is also changed. The original refracting surface( )now is the eighth(), the second( )is the seventh ()and so on. In addition, not only sequence is changed, but also the radius is changed from positive (negative) to negative(positive).The data after being reversed is shown below.