Optical system design of large aperture and long focal length telephoto objective lens

Songyan LI; Xiuling LIANG

doi:10.5768/JAO202041.0201007

Journal of Applied Optics, Volume. 41, Issue 2, 276(2020)

Optical system design of large aperture and long focal length telephoto objective lens

Songyan LI and Xiuling LIANG^*

Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, College of Photonic and Electronic Engineering,Fujian Normal University, Fuzhou 350007, China

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Figures & Tables(11)

Fig. 1. Schematic diagram of double reflection structure

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Fig. 2. 2D diagram of initial structure

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Fig. 3. 2D diagram of optimized structure

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Fig. 4. Curve diagram of longitudinal aberration

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Fig. 5. Curve diagram of MTF

Fig. 6. Spot diagram

Table 1. Parameters table of double reflection initial structure
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Table 1. Parameters table of double reflection initial structure
Surf Type Radius/mm Thickness/mm Glass
OBJ STANDARD Infinity 350 −
2 STANDARD −1 176.47 −320 MIRROR
STO STANDARD −1 302.86 456 MIRROR
IMA STANDARD Infinity − −

Table 2. Design specifications of optical system
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Table 2. Design specifications of optical system
Parameter Value
Wavelength/μm 0.486～0.656
Focal length/mm 1 000
Real image heigth/mm 5.5
F number 2.1
Aperture/mm 470
Pixel size/μm 6.45×6.45
Pixel 1 360×1 024
Total length/mm ≦600
MTF@80 lp/mm ≧0.3

Table 3. Design specifications of optimized structure

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Table 3. Design specifications of optimized structure

Surf	Type	Radius/mm	Thickness/mm	glass
OBJ	STANDARD	Infinity	Infinity	−
STO	STANDARD	Infinity	20	−
2	STANDARD	1 656.499	36.191	H-ZPK3
3	STANDARD	1.38E+004	5.004	−
4	STANDARD	1.077E+004	28.128	H-LAK50
5	STANDARD	−5 227.133	20.294	−
6	STANDARD	−1 347.51	25.057	H-ZK14
7	STANDARD	−7 677.977	299.085	−
8	STANDARD	−1 284.030	−299.085	MIRROR
9	STANDARD	−7 677.977	219.086	MIRROR
10	STANDARD	−390.518	8.118	N-LASF13A
11	STANDARD	136.306	1.141	−
12	STANDARD	971	14.600	F4
13	STANDARD	101.220	100.838	−
14	STANDARD	99.575	8.345	N-SF64
15	STANDARD	−169.826	4.708	−
16	STANDARD	−51.322	8.467	D-ZLAF85L
17	STANDARD	−74.508	20.181	−
IMA	STANDARD	Infinity	−	−

Table 4. Tolerance requirements

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Table 4. Tolerance requirements

表面序号	半径公差/ 光圈数	厚度公差/mm	倾斜公差/mm	偏心公差/mm	折射率公差	阿贝常数公差%
2	±50	±0.50	±0.15	±0.15	±0.001 0	0.8
3	±50	±0.10	±0.15	±0.15	−	−
4	±50	±0.50	±0.20	±0.20	±0.001 0	1
5	±40	±0.10	±0.10	±0.10	−	−
6	±25	±0.50	±0.05	±0.05	±0.000 6	0.7
7	±40	±0.10	±0.10	±0.10	−	−
8	±30	±0.10	±0.10	±0.10	−	−
9	±30	±0.10	±0.10	±0.10	−	−
10	±4	±0.03	±0.02	±0.02	±0.001 0	1
11	±4	±0.10	±0.03	±0.03	−	−
12	±4	±0.03	±0.03	±0.03	±0.001 0	1
13	±4	±0.10	±0.03	±0.03	−	−
14	±4	±0.03	±0.03	±0.03	±0.001 0	1
15	±4	±0.10	±0.03	±0.03	−	−
16	±4	±0.03	±0.02	±0.02	±0.001 0	1
17	±4	±0.10	±0.03	±0.03	−	−

Table 5. Results of Monte Carlo tolerance analysis
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Table 5. Results of Monte Carlo tolerance analysis
蒙特卡罗样本百分比 MTF值
90% ≥0.213 788
50% ≥0.315 880
10% ≥0.436 506

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Songyan LI, Xiuling LIANG. Optical system design of large aperture and long focal length telephoto objective lens[J]. Journal of Applied Optics, 2020, 41(2): 276

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