发明名称 |
Refractive optics with broad spectral coverage |
摘要 |
A multi-band refractive optical imaging system. In one example, the system includes a plurality of lenses configured to receive and propagate electromagnetic radiation in at least the visible spectral band and the longwave infrared (LWIR) spectral band, the plurality of lenses including a first group of lenses of a first crown material, at least one lens of a first flint material, and at least one lens of a second material different than the first crown material and the first flint material. The plurality of lenses includes at least one crown-flint pair configured as an achromat to provide color correction in the visible and/or LWIR spectral bands. The system also includes a first beamsplitter configured to separate the electromagnetic radiation into the visible spectral band and the LWIR spectral band, and a rear external aperture stop positioned between the plurality of lenses and the first beamsplitter. |
申请公布号 |
US8824055(B2) |
申请公布日期 |
2014.09.02 |
申请号 |
US201213679119 |
申请日期 |
2012.11.16 |
申请人 |
Raytheon Company |
发明人 |
Cook Lacy G. |
分类号 |
G02B27/14;G02B5/08;G02B27/12 |
主分类号 |
G02B27/14 |
代理机构 |
Lando & Anastasi, LLP |
代理人 |
Lando & Anastasi, LLP |
主权项 |
1. A multi-band refractive optical imaging system comprising:
a plurality of lenses configured to receive and propagate electromagnetic radiation in at least the visible spectral band and the longwave infrared (LWIR) spectral band, the plurality of lenses including a first group of lenses of a first crown material, at least one lens of a first flint material, and at least one lens of a second material, different than the first crown material and the first flint material, the plurality of lenses including at least one crown-flint pair configured as an achromat to provide color correction in at least one of the visible spectral band and the LWIR spectral band; a first beamsplitter configured to receive the electromagnetic radiation from the plurality of lenses, to separate the electromagnetic radiation into the visible spectral band and the LWIR spectral band; and a rear external aperture stop positioned between the plurality of lenses and the first beamsplitter. |
地址 |
Waltham MA US |