VTL5C2SLASH2 datasheet(27/76 Pages) PERKINELMER

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Application Notes—Photoconductive Cells

APPLICATION NOTE #1

Light - Some Physical Basics

Light is produced by the release of energy from the atoms of a material

when they are excited by heat, chemical reaction or other means. Light

travels through space in the form of an electromagnetic wave.

A consequence of this wave-like nature is that each “color” can be

completely defined by specifying its unique wavelength. The

wavelength is defined as the distance a wave travels in one cycle.

Since the wavelengths of light are very short they are normally

measured in nanometers, one nanometer being equal to 1 x 10-9

meters.

The spectral response of PerkinElmer’s photoconductors are specified

by lots of relative response versus wavelength (color) for various

material types.

Natural Illuminance

Room Illumination

Ultraviolet

(To X-rays and Gamma Rays)

Infrared

(To Radar Waves)

Visible Light

400

700

Violet

Red

Wavelength

Violet

Below 450 nm

Blue

450 - 500 nm

Green

500 - 570 nm

Yellow

570 - 590 nm

Orange

590 - 610 nm

Red

610 - 700 nm

Sky Condition

Light Level (Typical)

Direct Sunlight

10000 fc

Overcast Day

1000 fc

Twilight

1 fc

Full Moon

0.1 fc

Clear Night Sky (moonless)

0.001 fc

Lighting Condition

Light Level (Typical)

Candle - Lit Room

5 fc

Auditorium

10 fc

Classroom

30 fc

Inspection Station

250 fc

Hospital Operating Room

500 - 1000 fc

VTL5C2/2 데이터시트(PDF) 27 Page - PerkinElmer Optoelectronics

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