Dr. SPECKLE Model:SM01VS09



(Dedicated software M-Speckle)

Speckle evaluation tool for laser display development

Speckle is the random laser interference pattern formed on human eye retina.

Speckle noise may degrade the image quality of laser displays seriously.

Accurate evaluation of speckle noise is the first step to reduce speckle noise.


  • The only measurement system fully compliant with the international   standard, IEC 62906-5-2(measuring method).
  • CCD camera optical system accurately reflects the optical characteristic of human eye such as the point spread function and its auto correlation function.
  • The speckle contrast calculable as a quantitative measurement index of speckle noise.
  • Portable size and weight.



Speckle measurement Measurement value Speckle contrast CS = σ / Ibar
(σ is standard deviation and Ibar is average intensity of captured image)
Range 0.01 ~ 1.00 (Measurement resolution: Significant to two decimal places)
Measurement conditions Luminous Flux 10 lm (lumens) or over (monochromatic) *Assuming a scanning type laser projector
Observation distance L 300 mm to 1000mm (TBD)
Observed area on screen 13 mm square (L = 300 mm) ~ 40 mm square (L = 1000 mm)
*Imaging area is 300×300 pixels.
Wavelength Visual light region
Projection image Light beam with spatial uniform and temporally static image
Camera CCD device Sony image sensor with external cooling system, 1.4 million pixels (1360×1024)
Imager size 8.8 mm×6.45 mm (pixel size 6.45 μm×6.45 μm)
Shutter Electronic shutter
Cooling method Peltier cooling (Air cooling, 0 degrees C)
A/D Conversion 16-bit (65,536 gradation)
Color Black & White
Lens Nikon Single focal length lens f 50mm/F1.4
External trigger (Optional) Synchronous photography by a TTL CMOS 5V falling edge signal
Aperture size Pinhole diameter: φ0.8 mm, φ1.0 mm, φ1.2 mm, φ1.5 mm (selectable)
Filter wheel (Optional) Filter type: Red, Green, Blue, ND (OD: 2.0) (selectable)
Consumption 100W (without computer)
Outer dimensions and weight Speckle meas. unit 257 (L)×160 (W)×213 (H) mm, 4.8 kg
(5.2kg with the filter wheel control)
Power supply box 248 (L) ×180 (W)×118 (H) mm, 2.3kg


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