| 摘要 |
FIELD: physics. ^ SUBSTANCE: lens can be used in thermal imaging, television and heat source direction finding devices. The lens consists of at least two components, each of which contains at least two lenses stuck together. The objective uses optical material with spectral transparency range of at least 0.85Ç10.6 mcm. Refraction index of at least two lenses is greater than 2.1. One of the surfaces has the shape of a quadric ellipsoid. The entrance pupil of the lens is on the first surface. ^ EFFECT: wider operating spectral range, field of vision and ratio of lens aperture with improved quality of the formed image. ^ 3 dwg, 1 app |
