Photometer/Radiometer J16

Tektronix; Portland, OR

Data
Forum
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Collections

  • Year
  • 1973
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 246435

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • none
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / 7.6 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Photometer/Radiometer J16 - Tektronix; Portland, OR
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 123 x 60 x 203 mm / 4.8 x 2.4 x 8 inch
  • Notes

  • Th J16 is a portable digital photometer/radiometer capable of making variety of light measurement.
    3 1/2 digit LED readout
    Stability: Within 2% per year
    Linearity: Within 2% over the entire range, enable single point calibration
    Power Requirements: Internal rechargeable NiCd batteries
    Suitable Probe: Tektronix Irradiance Probe J6502

  • Net weight (2.2 lb = 1 kg)
  • 1.5 kg / 3 lb 4.9 oz (3.304 lb)
  • Mentioned in
  • - - Manufacturers Literature
  • Author
  • Model page created by Pius Steiner. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Photometer/Radiometer is part of the collections of the following members.

 Forum

Forum contributions about this model: Tektronix; Portland,: Photometer/Radiometer J16

Threads: 1 | Posts: 1

GLOSSARY

Photometry
The measurement of light visible to the human eye.

Radiometry
The measurement of light within the total optical spectrum.

Color Temperature
The temperature of a blackbody whose radiation has the same visible color as that of a given non-blackbody radiator. Usually expressed in °k.

Foot-candle
Unit of incident illumination.

Foot-lambert
A unit of illumination emitted or diffusely reelected by a source. Two additional units are commonly used:
the lux (the metric unit of illuminance) and
the nit (the metric unit of luminance).
1 foot-candle = 10.76 lux
1 foot-lambert = 3.426 nits

Illuminance
The amount of luminous flux through a unit of surface area and is usually measured in foot-candles (lumens/ft2).

Inverse Square Law
The decrease of light intensity with increasing distance. Twice the distance, reduces the illumination to one-quarter.

Irradiance
The amount of radiant flux received by a unit of surface area and is usually measured in watts/cm2 *.
* Other units of irradiance such as uW/cm2 and W/m2 are also used extensively.

Lambert's Law
Describes the spatial characteristics of a perfectly diffusing surface which may be either emitting or reflecting light. The light emitted or accepted by such a surface decreases with angle (from perpendicular) according to the cosine of the angle.

Luminance
The amount of light emitted or scattered by a surface and is usually measured in  foot-lamberts.

Photopic
Spectral (color) sensitivity of the average human eye, predominantly peaked in the yellow-green region.

Steradian
A unit of area on the surface of a sphere equal to the radius squared. There are 12.6 steradians total area on a sphere.

Spatial
The directional characteristics of light in space.

Spectral
The distribution of light by wavelength within an electromagnetic spectrum.

Note that each radiometric unit has a photometric equivalent differing only in spectral response of the sensor. However, the units are not interchangeable.

PROBE CHARACTERISTICS

for probes: J6501 J6511 J6502/J6512 J6503 J6523 J6504 J6505

Source: Tektronix Catalog 1986

Attachments

Pius Steiner, 03.Jan.14

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