Night vision

About: Night vision is a research topic. Over the lifetime, 6004 publications have been published within this topic receiving 67372 citations.

Night vision monocular

Abstract: A night vision monocular that includes an objective lens subassembly for receiving low intensity and/or infrared light. The objective lens subassembly focuses the light onto an image intensifier tube that converts the light into a visible image. The visible image passes through a collimator subassembly that collimates the visible image. Finally, the collimated image is viewed through an eyepiece subassembly. The objective lens subassembly, image intensifier tube, collimator subassembly and eyepiece subassembly are each separately manufactured subassemblies that are encased in subhousings and are ready to be assembled into a larger optical device. The housing of the present invention night vision monocular is a two piece structure, having a first half and an opposite second half. Partitions extend inwardly from a plurality of locations on both halves of the housing. The partitions are contoured and positioned to abut against and retain the various subassemblies within the night vision device. At least two partitions from each half of the housing abut against and support the objective lens subassembly, the image intensifier tube, the collimator subassembly and the eyepiece subassembly. The partitions within the housing are the only elements of positioning and optically aligning the various subassemblies. Consequently, no adhesive or mechanical fasteners are needed to retain components within the housing. The housing itself need not be precision machined, consequently, a night vision device is provided that is easy to manufacture and is well suited for a low-cost mass-production manufacturing environment.

A review of automotive infrared pedestrian detection techniques

Abstract: In automotive design, the issue of safety remains a growing priority. Recently the focus has extended beyond the occupants of the vehicle and has turned towards other vulnerable road users (VRU). Simple night vision systems have already become an important safety feature in modern high end automobiles. The next generation of advanced driver assistance systems will automate the detection of VRUs, to improve safety further by not distracting the driver's attention from the road ahead, and even identifying dangerous situations where the driver may not. This paper presents a review of the state of the art image processing techniques for automatic detection and classification of VRUs in automotive far infrared imagery.

Phenotype associated with mutation in the recently identified autosomal dominant retinitis pigmentosa KLHL7 gene.

Abstract: OBJECTIVE: To characterize the clinical phenotype, with an emphasis on electrophysiologic findings, in a family with autosomal dominant retinitis pigmentosa caused by mutation in the recently identified KLHL7 gene. METHODS: Eleven patients from a single family were selected from the Swedish retinitis pigmentosa register. Four patients had been examined 13 to 17 years earlier and underwent further ophthalmologic examination, including visual acuity, fundus inspection, Goldmann perimetry, full-field electroretinography (ERG), multifocal ERG, and optical coherence tomography. KLHL7 mutation was identified by sequence analysis. RESULTS: In most examined family members, the fundus showed minor abnormalities. Full-field ERG demonstrated reduced cone and rod function, but rod responses were preserved in some patients late in life. Follow-up ( T) in 7 family members. CONCLUSIONS: Observed in 2 Scandinavian families to date, KLHL7 mutation has recently been associated with autosomal dominant retinitis pigmentosa. Clinical examination with long-term follow-up verified a phenotype with a varying degree of retinal photoreceptor dysfunction and, in some family members, with late onset and preserved rod function until late in life. Clinical Relevance Patients with minor retinal abnormalities and normal ERG findings early in life can harbor an autosomal dominant form of retinitis pigmentosa with a varying degree of visual impediment. Some patients with late onset may retain night vision for many years. (Less)