Jadak Photo Research SpectraScan PR-7 Series, Руководство пользователя

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Chapter 2
– System Overview
26
Neutral Density Filter Density Signal Attenuation % Transmission
ND-0.3 0.3 2 times 50
ND-0.7 0.7 5 times 20
ND-1 1 10 times 10
ND-2 2 100 times 1
ND-3 3 1000 times 0.1
Table 5 - Neutral density filters for the PR-7XX.
Reflectance Standard (RS-3 and SRS-3)
The 2” diameter (51 mm) PTFE reflectance standard can be used for making ambient light measurements,
measurements of point sources (e.g. lamps) or measurements of the illuminating source for reflectance or L*a*b*
calculations. The reflectance standard features a Society of Automotive (SAE) ¼ - 20 threads, black anodized,
aluminum case for mounting to an optical table or other appropriate fixture.
RS-3
The RS-3 is un-calibrated - all spectral reflectance correction factors are set to 1.00.
SRS-3
Spectrally calibrated for absolute spectral reflectance - includes spectral reflectance factors and certificate of
calibration.
IS-730 Integrating Sphere
An integrating sphere is designed to measure the total luminous and radiant power of small point sources such
as miniature lamps, light emitting diodes (LED’s) etc. over 4π steradians. Using this accessory, Radiant and
Luminous Flux (watts and lumens), correlated color temperature (CCT) and chromaticity coordinates can be
measured. The input of the integrating sphere accepts virtually any discrete LED or small lamp with two leads.
This accessory replaces the MS-75 during use.
Please consult factory for other special sizes.
CR-730 Cosine Receptor
The cosine receptor can be used for applications where it is required to know the amount of light incident on a
surface or object. For example, irradiance or illuminance measurements of light incident on a projector screen or
to design light fixturing for a building or office space. A unique feature of this accessory is that it can be oriented
360 degrees about the optical axis of the instrument providing flexability for a wide range of applications. The
cosine receptor replaces the standard MS-75 lens and reports irradiance in watts/m² and illuminance
measurements in footcandles (fc) or lux depending on the unit type selected
in the instrument’s
Preferences
menu.