Patent
Wide-angle infrared lens and detector with internal aperture stop and associated method
TLDR
In this paper, an infrared lens and detector system and associated method are disclosed that utilize infrared lenses to form an internal entrance pupil at which an internal aperture stop is placed to control the intensity of infrared radiation focused on the infrared detector.Abstract:
An infrared lens and detector system and associated method are disclosed that utilize infrared lenses to form an internal entrance pupil at which an internal aperture stop is placed to control the intensity of infrared radiation focused on the infrared detector. In more detailed respects, the infrared lens is an assembly including a first infrared lens, a second infrared lens spaced from the first lens to form a pupil between the first and second lenses, and an aperture stop disposed proximal the pupil. The aperture stop may have a fixed diameter or may have an aperture stop that is manually or automatically adjustable depending upon the intensity of the infrared radiation being viewed. Significantly, this lens assembly may be sealed for improved performance particularly in extreme conditions. In more detailed respects, the lens assembly forms a wide-angle lens and includes a diffractive surface on the second lens to reduce color aberrations and improve performance. In another respect, the infrared lens is part of a detector system that also includes an infrared detector, a signal processor, and a display.read more
Citations
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Patent
Image intensifier and LWIR fusion/combination system
TL;DR: In this paper, an infrared imaging device combines two sensors, each sensor sensitive to a different spectral range of infrared radiation, in a single camera sharing one of three common optical apertures, thus parallax is eliminated between the sensors.
Patent
Near field lens having reduced size
Jeyachandrabose Chinniah,Amir P. Fallahi,Jeffrey Allen Erion,Edwin Mitchell Saline Sayers,Thomas Lee Jones +4 more
TL;DR: In this article, a near field lens for an automotive light assembly which has a reduced thickness is described, where a pocket is formed in the main body for receiving light from a light source.
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Light manifold for automotive light module
Jeyachandrabose Chinniah,Amir P. Fallahi,Jeffrey A Erion,Edwin Mitchell Saline Sayers,Thomas Lee Jones +4 more
TL;DR: In this paper, a light manifold for an automotive light module emitting light to the side of a longitudinal axis along which light is to be directed is presented, which permits the creation of light distribution patterns for particular functions, such as the stop light function for an automobile, that are otherwise difficult to effectively produce.
Patent
Lens assembly for an automobile light assembly having LED light source
TL;DR: In this article, a light assembly is provided having a lens assembly that splits the function of a near field lens into two components, thereby permitting a manufacturable lens that achieves the desired beam size and intensity.
Patent
Side emitting near field lens
Jeyachandrabose Chinniah,Amir P. Fallahi,Jeffrey Allen Erion,Edwin Mitchell Saline Sayers,Thomas Lee Jones +4 more
TL;DR: In this article, a near field lens for an automotive light assembly which has a reduced thickness is described, where a pocket is formed in the main body for receiving light from a light source.
References
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Patent
Reflective chopper for infrared imaging systems
TL;DR: In this article, a helicopter is used to scatter infrared radiation from a viewed scene, which is detected with an infrared detector and used to produce a reference signal, which represents the uniform average radiance of the scene.
Patent
Low weight, achromatic, athermal, long wave infrared objective lens
TL;DR: In this paper, a low weight, achromatic, athermal, long wave infrared objective lens with one element having a positive optical power and the other having a negative optical power but with a higher thermo-optic coefficient than the first element was proposed, where diffractive color correcting optical surface is generated on one surface of one of the elements and aspheric surfaces may be included for further performance gains.
Patent
Objective lens system utilizing diffractive optical element
TL;DR: A low cost objective lens system that provides complete axial color correction with no substantial residual color dependent aberrations such as spherochromatism or chromatic coma was proposed in this article.
Patent
Large-aperture three-lens objective with aspherical-surfaces
TL;DR: In this article, a three-lens objective with a front lens, a median lens and a rear lens is considered, and each of the lenses has at least one aspherical surface.
Patent
High speed infrared wide angle lens system
TL;DR: In this paper, an objective or compound lens with high speed and large field angle for applications using infrared radiation was disclosed. But the authors did not specify the spectral bandpass in the 2-2.5 μm region.