30× VIS-SWIR wideband zoom lens design (<i>invited</i>)

Fig. 6. (a) Cam curve of the wideband zoom system (Z group and C group correspond to Z-part and C-part in Fig.3, respectively) ; (b) Error function change curve through the zoom range

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Table 1. Performance of some typical glass materials in 0.4-1.7 μm

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Table 1. Performance of some typical glass materials in 0.4-1.7 μm

Material	Index of refraction			Chromatic dispersive power			Thermal expansioncoefficient	Wide-band chromatic dispersive power
Material	n_{0.55 μm}	n_{0.85 μm}	n_{1.35 μm}	C_{0.4-0.7 μm}	C_{0.7-1.0 μm}	C_{1.0-1.7 μm}	T/×10⁻⁷ K	C_{0.4-1.7 μm}
注：参数取自2023版成都光明《光学玻璃数据表》。
H-K9L	1.51852	1.50986	1.50321	3.43%	1.08%	1.71%	76	3.00%
H-FK95N	1.43879	1.43385	1.43033	2.32%	0.71%	1.01%	144	1.95%
H-QK3L	1.48897	1.48141	1.47521	3.11%	1.03%	1.74%	92	2.86%
H-ZPK5	1.59465	1.58564	1.57993	3.24%	0.92%	1.14%	124	2.51%
H-ZF62	1.93212	1.89082	1.86288	11.76%	2.46%	2.26%	64	6.86%
H-ZF88	1.95696	1.90827	1.88527	13.93%	2.82%	2.58%	60	7.89%
H-LAK4L	1.64227	1.63085	1.62200	3.66%	1.16%	1.86%	60	3.21%
H-LAK53B	1.75808	1.74299	1.73270	4.25%	1.24%	1.72%	57	3.42%
H-LAF3B	1.74753	1.73081	1.72124	5.04%	1.31%	1.45%	80	3.60%
H-LAF50B	1.77582	1.75966	1.74904	4.50%	1.28%	1.70%	58	3.53%
H-ZBAF21	1.72745	1.70855	1.69788	6.09%	1.51%	1.67%	76	4.17%
H-ZLAF55D	1.80768	1.78996	1.77885	4.82%	1.33%	1.66%	62	3.65%
H-ZLAF68C	1.88760	1.86590	1.85376	5.55%	1.43%	1.54%	70	3.91%

Table 2. Design requirements
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Table 2. Design requirements
Parameter Value
Work wavelength/μm 0.48-1.7
Horizontal Field of view (HFOV)/(°) 38.8-1.25
Effective focal length/mm 10-300
F-number ≤5.5
Overall length/mm ≤190
Back focal length/mm ≥15

Table 3. Performance of the zoom optical system in wideband
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Table 3. Performance of the zoom optical system in wideband
MTF Chromatic focal shift Relative distortion
EFL=10 mm
EFL=150 mm
EFL=300 mm

Table 4. The resulted tolerance limits of the optical system

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Table 4. The resulted tolerance limits of the optical system

Tolerance type	Tolerance range
Refractive index	±0.0002
Abbe number	±0.003
Radius of lens surface	±3 fringes
Irregularity of lens surface	±0.3
Decenter of lens surface/mm	±0.01
Center thickness of lens/mm	±0.02
Element tilt in group/(" )	±40
Element decenter in group/mm	±0.01
Element air gap in group/mm	±0.02
Lens group tilt among group/(' )	±2
Lens group decenter among group/mm	±0.02
Lens group air gap among group/mm	±0.02

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Rui QU, Hongwei ZHANG, Huinan GUO, Jian LI. 30× VIS-SWIR wideband zoom lens design (invited)[J]. Infrared and Laser Engineering, 2024, 53(10): 20240296

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