varifocal


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varifocal

1. Optics having a focus that can vary
2. relating to a lens that is graduated to permit any length of vision between near and distant
References in periodicals archive ?
This specification describes the requirements for a varifocal ultra-wide no
In a varifocal lens, distance vision is controlled by the upper part of the lens, intermediate vision by the middle area and near vision through the lower part of the lens.
I wish I had been able to: Maria has new varifocals that go dark in sunlight, so that she looks like a film star.
Subsequently, the laser beam is adjusted by two lenses that magnify the laser beam that is then reflected from a mirror into the varifocal lens.
It has a metal thermal housing with IP66 protection, 3.5-16 mm varifocal lens with IR-correction and AI, as well as built-in IR LEDs with up to 60 m of working distance.
The series includes surface or flush-mount models with a choice of three different varifocal tenses and offer 15-bit digital video processing.
"The change is so accurate that we can even make the lens bifocal or varifocal, so as well as giving them good vision at distance we can give them good vision for reading.
Caracteristicas: Memoria flash de 8MB, SDRAM de 64 MB, sistema operativo Linux2.4, CMOS de 1/3.3", sensor de rango dinamico amplio(WDR) CMOS para las imagenes de calidad superior en todas las condiciones de iluminacion, filtro IR y LED infrarrojo para imagenes de dia y noche, cubierta para exterior y a prueba de vandalismo, software de monitoreo y grabacion para hasta 32 camaras, soporta compresion de video simultaneo en MPEG-4 y Motion JPEG, audio bidireccional, PoE, deteccion de movimiento y lente varifocal 3.3mm-12mm, F1.4.
The DM110 ($995) includes a normal minidome, a 2.8-9.5mm, 3.4x varifocal auto iris lens and more.
Featuring an autoiris varifocal lens in a compact heated dome, the camera position can be adjusted horizontally and vertically.
The 8.5- to 40-millimeter IR varifocal lens features an extended telephoto range while maintaining a maximum aperture of F1.3.