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Diffraction limited lens
| Fiber Optic Glossary |
A lens with negligible residual aberrations.
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Negligible, английский
- Nil
- Пренебрежимо малый
- Незначительный; пренебрежимо малый
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Doublet, английский
- A lens assembly made up of two simple lens elements.
- N дублет downtime n псхл. даун-тайм1 (ант. uptime)
- Дублет (разделение спектра характеристичного рентгеновского излучения на подгруппы с незначительно различающейся длиной волны)
Crown glass, английский
- A type of optical glass with relatively low refractive index and dispersion.
- A spectacle lens material of 1.523 index. crp (corneal reflection pupilometer) – a device used to measure the distance between pupils of the eyes in millimeters. crt (computer reading trifocal) – a multifocal design that features wider intermediate areas with a 70% add strength. they are suited for arms-length distance such as computer screen.
- A handmade glass of soda-lime composition, used for windows; manufactured in the early 19th century by a now-obsolete process in which a hollow sphere of glass was blown while still very soft, then spun to form a large, nearly flat circular disk. during the spinning process, ripple lines were formed in a pattern of concentric circles, with their center at the center of the spun disk; this central area was used in a bull’s eye window. also
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