Testing of Concave Aspheric Surface with Self-Collimating and Correcting Lens in Front of Back Conjugate Point

Fig. 3. Three types of near-double-lens. (a) Two positive lenses; (b) positive and negative lens group with positive lens in front; (c) negative positive lens group with negative lens in front

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Fig. 4. Testing optical path and partial enlarged view

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Fig. 5. Spherical aberration curve

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Fig. 6. Wavefront map

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Fig. 7. Schematic of reflective coating on self-collimating-surface

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Fig. 8. Single lens inspection ability. (a) Maximum aperture; (b) maximum relative aperture

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Fig. 9. Testing ability of negative and positive lenses. (a) Maximum aperture; (b) maximum relative aperture

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Fig. 10. Testing ability of positive and negative lenses. (a) Maximum aperture; (b) maximum relative aperture

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Table 1. System parameters of testing optical path

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Table 1. System parameters of testing optical path

No.	Type	Radius /mm	Thickness /mm	Glass	Diameter /mm	Conic
OBJ	Standard	Infinity	14.00		0.00	0.00
1	Standard	-17760.00	25.00	K9	3.69	0.00
2	Standard	202.69	1.00		8.03	0.00
3	Standard	196.33	72.00	K9	8.32	0.00
4	Standard	-446.15	8416.48		20.70	0.00
STP	Standard	-8000.00	-8416.48	Mirror	2007.55	-1.00
6	Standard	-446.15	-72.00	K9	201.36	0.00
7	Standard	196.33	-1.00		201.78	0.00
8	Standard	202.69	-25.00	K9	200.00	0.00
9	Standard	-17760.00	25.00	Mirror	199.43	0.00
10	Standard	202.69	1.00		200.01	0.00
11	Standard	196.33	72.00	K9	201.78	0.00
12	Standard	-446.15	8416.48		201.37	0.00
13	Standard	-8000.00	-8416.48	Mirror	2007.30	-1.00
14	Standard	-446.15	-72.00	K9	20.72	0.00
15	Standard	196.33	-1.00		8.33	0.00
16	Standard	202.69	-25.00	K9	8.05	0.00
17	Standard	-17760.00	-14.00		3.71	0.00
IMA	Standard	Infinity			0.00	0.00

Table 2. Tolerance range of lens group unit: mm
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Table 2. Tolerance range of lens group unit: mm
Parameter Tolerance
Δd₁₂ ±0.02
Δd₂₃ ±0.05
Δd₃₄ ±0.02
Δr₁ ±10.0
Δr₂ ±0.1
Δr₃ ±0.1
Δr₄ ±0.2

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Pengwei Zhao, Lili Qi, Jinping Zhang, Liehua Zheng. Testing of Concave Aspheric Surface with Self-Collimating and Correcting Lens in Front of Back Conjugate Point[J]. Acta Optica Sinica, 2020, 40(20): 2022002

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