Illuminance or illumination

STE India has the best solution to measure light with accuracy and precision.. Lead in CFL and LED test instruments. Our main products are Spectroradiometer, Goniophotometer and Integrating sphere. Our Spectroradiometer has the feature for photobiological safty. For any query please visit www.ledtesting.co.in or write to steindiamkt@gmail.com.

What is illuminance or illumination?

First of all both are same, illuminance term is used in photometry and illumination is the term used in Photography in units of foot candela.

Illuminance is technical term used in photometry for  visible spectral range.

It is the amount of total light incident per unit area. It is generally denoted by symbol E.

illuminanace illumination

Formula to calculate illuminance  is ….

E= Ø/ A

Where Ø is Luminous Flux and A is Area.

Luminous Flux: It the amount of light emitted by light source. It is measured in Lumen (Lm)

Unit of Illuminance

SI Units Lux or Lm/m2

CGS Units is Phot

I Phot = 10000 lux = 10000 Lm/m2

How to Measure illuminance?

  1. Light meter/ Illuminance Meter/ Lux Meter
  2. Spectroradiometer with optical Probes

 

STE India offers a variety of optical probes for photometric and radiometric measurements that differ in spectral range, degree of cosine correction and a type of optic fiber.  illuminance probes are available for all our spectrometers, and designed for each system based on the spectral range and optical performance of the instrument.Each complete set includes a measuring probe, a fiber optic cable, and adapter for a dedicated spectrometer. Includes calibration traceable to National Laboratories.

Features of GL Optic Probes

  1. Highly Accurate
  2. Reliable
  3. Repeatable results

Probe

Image Features

Works with  Spectroradiometer

GL Opti Probe 1.1.10 Illuminance 

GL opti probe 1.1.10 Submersible illuminance/irradiance probe for underwater measurements.. The set can be spectrally calibrated only in a range above. The set can be spectrally calibrated only in a range above 400 nm

GL Spectis 1.0

Or

GL Spectis 1.0 Touch series

GL Opti Probe 5.1.10

 

GL opti probe 5.1.10 Irradiance / illuminance diffuser with quartz glass fiber optic for extended spectral irradiance measurements. This probe covers the full spectral range from UV to IR within the range used by the spectrometer

GL OPTI PROBE 5.1.50 irradiance / illuminance

GL opti probe 5.1.50 Irradiance / Illuminance diffuser with quartz glass fiber optic for extended spectral irradiance measurements.

This probe covers the
full spectral range from UV to IR within the range of the used spectrometer

GL Spectis 5.0

or

GL Spectis 6.0

or

GL Spectis 8.0

 

Under water Measurement: Our product has made easier to measure the light underwater. The scattering behavior of light underwater is proportional to the beam angle of the source. Having more tightly collimated light sources helps reduce scatter at longer distances and takes full advantage of the detector resolution. So here is the solution with us to measure light underwater with our Optical probe GL Opti Probe 1.1.10 that can be  submersible in water and can measure illuminance / irradiance under water.

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