为了满足单兵装备目视需求,优化设计了两种不同结构的大出瞳直径目镜,该目镜适配2.1 in LCD。两种形式的目镜系统参数相同,在出瞳直径为68 mm的前提下实现了27 mm出瞳距,2.1 in LCD观测,焦距为75 mm,视场为29.5°。首先设计一个由...为了满足单兵装备目视需求,优化设计了两种不同结构的大出瞳直径目镜,该目镜适配2.1 in LCD。两种形式的目镜系统参数相同,在出瞳直径为68 mm的前提下实现了27 mm出瞳距,2.1 in LCD观测,焦距为75 mm,视场为29.5°。首先设计一个由折射球面构成的折射式目镜系统,共由9片透镜组成。其次改变其中两种透镜结构形式,再将其中一个球面设置为非球面,优化透镜材料,从而得到一个含非球面的折射式目镜。结果表明:在20 lp/mm频率处,含非球面折射目镜所有视场大于0.2,其中中心视场MTF达到0.67;对比第一种纯球面折射式目镜系统,其长度减少9.7%,畸变由有-2.95%下降到-0.616%,公差分配后MTF值高,成像质量更好。所设计的含非球面形式的目镜系统具有较好的校正高级球差,降低了靶面过大易出现图像变形的风险,同时系统的公差不敏感,降低了工程化风险;光机结构相比于纯球面结构长度短、重量轻,具有良好的应用前景,尤其适用于单兵观测。展开更多
Based on the holographic theory, a pair of reflective holographic lenses have been utilized with an aim to improve the optical properties of night vision goggles. The aberration distribution of the holographic lens ha...Based on the holographic theory, a pair of reflective holographic lenses have been utilized with an aim to improve the optical properties of night vision goggles. The aberration distribution of the holographic lens has been confirmed by experiments and compensated by a conventional symmetrical spherical system. Resulting data of the whole optical system are given.展开更多
We review, with proper derivation and proofs, the common undergraduate formulas for building images of objects using a system of lenses with spherical surfaces. This is done using the first-order approximation which a...We review, with proper derivation and proofs, the common undergraduate formulas for building images of objects using a system of lenses with spherical surfaces. This is done using the first-order approximation which assumes that light rays deviate from the symmetry axis by only small angles. Yet, even this most basic approximation results in surprisingly complex theory, which is then applied to explain workings of everyday optical instruments.展开更多
文摘为了满足单兵装备目视需求,优化设计了两种不同结构的大出瞳直径目镜,该目镜适配2.1 in LCD。两种形式的目镜系统参数相同,在出瞳直径为68 mm的前提下实现了27 mm出瞳距,2.1 in LCD观测,焦距为75 mm,视场为29.5°。首先设计一个由折射球面构成的折射式目镜系统,共由9片透镜组成。其次改变其中两种透镜结构形式,再将其中一个球面设置为非球面,优化透镜材料,从而得到一个含非球面的折射式目镜。结果表明:在20 lp/mm频率处,含非球面折射目镜所有视场大于0.2,其中中心视场MTF达到0.67;对比第一种纯球面折射式目镜系统,其长度减少9.7%,畸变由有-2.95%下降到-0.616%,公差分配后MTF值高,成像质量更好。所设计的含非球面形式的目镜系统具有较好的校正高级球差,降低了靶面过大易出现图像变形的风险,同时系统的公差不敏感,降低了工程化风险;光机结构相比于纯球面结构长度短、重量轻,具有良好的应用前景,尤其适用于单兵观测。
文摘Based on the holographic theory, a pair of reflective holographic lenses have been utilized with an aim to improve the optical properties of night vision goggles. The aberration distribution of the holographic lens has been confirmed by experiments and compensated by a conventional symmetrical spherical system. Resulting data of the whole optical system are given.
文摘We review, with proper derivation and proofs, the common undergraduate formulas for building images of objects using a system of lenses with spherical surfaces. This is done using the first-order approximation which assumes that light rays deviate from the symmetry axis by only small angles. Yet, even this most basic approximation results in surprisingly complex theory, which is then applied to explain workings of everyday optical instruments.
