Integrating Sphere Detector ISD-1.6-Si-1 and ISD-1.6-Si-FC-1

Radiant power measurement detector equipped with a compact size 16mm diameter integrating sphere for small size sources with divergent beam light emittance like laser diode dyes & optical fibers. The small footprint detector can be placed directly in front of the light source to collect the entire light beam through its 3mm measurement port. The standard detector is built with a silicon photodiode to measure over a spectral range from 400 to 1100nm. An alternative model with a FC connector added allows connection of a spectrometer. The FC connector is located opposite the measurement port to collect the maximum amount of light signal for high resolution spectrometers with limited sensitivity. The detector head is traceably calibrated and certified to international standards. The ISD-1.6-Si-1 and ISD-1.6-Si-FC-1 detector head can also be supplied in a near-infrared version with an InGaAs photodiode to cover the 800nm to 1700nm spectral range.  

Illumination optimization through a raised S/P ratio


The use of a raised S/P ratio i.e. the ratio to the scotopic to photopic vision is addressed in two technical notices from the Illumination Engineering Society of North America.

The TM12-12 is well suited for mesopic vision (night vision), a combination between photopic (cones) and scotopic vision (rods) in situations with relatively little light e.g. driving in pure street lighting.

The TM 24-13 on the other hand addresses the illuminance topic in view of the visual acuity and visual performance in challenging interiors. In the foreground of this written report is the EVE factor (Equivalent Visual Efficiency).

The main point in both documents from the IES is that raised spectral blue proportion in the illuminance enables improved energy efficiency.

The BTS256-E BiTec Sensor Luxmeter from Gigahertz-Optik is a modern light meter designed for both photometric and scotopic illuminance as well as the luminous color and color rendering. In its latest version, the S/P ratio and EVE factor are also indicated on the display. The BiTec light sensor of the BTS256-E enables precise measurements over a large dynamic range.

For detailed information on this leading-edge multi-sensor device see the BTS256-E.



bts256 nl

Positive feedback to the BTS256-E:

“I made a presentation about the new light meter for my colleagues at work and in the end of it I said: I like it so much. I was going to have a Xmas picture taken of it and send to my friends and family. Friend of mine is a professional photographer so I called him the next day and booked a Xmas picture of myself and the new light meter and of course I could not resist and added you on the list.”

Kristján Gunnar Kristjánsson
Lighting designer


By the way:

All visitors of the Photonics West can get a demonstration of the device at out fair booth.


BTS2048-VL – spectral color measurement device for industrial applications


The BTS2048-VL light meter from Gigahertz-Optik is an ideal spectral light and color measurement device that is well suited for use in industrial applications. Its outstanding features include:

  • Diode array with an electronic shutter for measurement times between 2µs and 4s
  • Fast data read out – 7ms for a complete data record via LAN interface
  • Precise measurement data in photometric and colorimetric quantities
  • 2 nm optical bandwidth for a high spectral resolution
  • 280nm to 1050 nm wide spectral range
  • Standard filter wheel (4 positions: open/closed/OD1/OD2)
  • Trigger inputs and outputs for timed synchronization
  • High calibration stability through a diffuser window instead of flexible light guides
  • Compact and sturdy design for flexible system implementation
  • Software development kit for easy software implementation
  • Powerful user software for control of the measurement device and data analysis
  • Excellent value for money

Gigahertz-Optik GmbH also offers complementary products for this measurement device with the Bi-Technology Sensor. These include integrating spheres, luminous intensity attachments, goniometers, etc.

All visitors of LpS2014 in Bregenz (30th September to 2nd October 2014, booth no. 6) have an opportunity for personal consultation and demonstration.
We look forward to your visit.