Fig. 1. Optical system layout

Fig. 2. Diagrams of optical system design results

Fig. 3. Lens holder with stress-free design

Fig. 4. Lenses mount connected to lenses barrel by stress-free design

Fig. 5. Mode analysis result of lenses assembly

Fig. 6. Lenses on vibration test

Fig. 7. Digital number and gray show of the pinhole image after vibration test

Fig. 8. Ensquared energy test of the lenses at 200 K

Fig. 9. Digital number and gray show of the pinhole image at 200 K