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Table of Contents

Definition

BSDF? ??? ?? ?? ??? ???, ???? ?? ???? ??? ???? ??? ?????. Bidirectional Scattering Distribution Function? ??????.

????? ??? BSDF ?? ?? ??? ????.

Formula BSDF | 草榴社区

?? ??

  • L: ??? ???? ?? ?? ??
  • E: ?? ???? ?? ?? ??
  • Λ: ??
BSDF, input light, and observer direction | 草榴社区

??? ? ??? ????? ?? ? ??? ????, BRDF? BTDF? ??? ?????.

  • BRDF (Bidirectional Reflectance Distribution Function, ??? ??? ?? ??)
  • BTDF (Bidirectional Transmittance Distribution Function, ??? ??? ?? ??)
Incident light, specular reflection, reflected scatter distribution BRDF, transmitted scatter distribution, BTDF, specular transmission

Why is BSDF important to an optical design?

?? ??? BSDF? ??? ??? ?????? 

 

?? ?? ???? ??? ????? ??? ??? ?? ?? ??? ?????. ??? ??? ???? ??? ??? ?????? ??? ??? ?? ????, ?????? ? ??? ??? ? ????. ??? ??? ??? ??? ??? ??? ? ???? ???? ?? ?????. ??? ??? ?? ?? ?? ??? ??? ?? ???? ?? ?????? ??? ???? ???? ????. 

 

??:

  • ?? ???? ?? ?? ?????? ?? ??? ?? ??? ?????.
  • R&D ????? ??? ??? ??? ?? ??? ??? ???? ???.
  • ?? ??? ?? ??? ???? ????? ???. 

 

???:

  • ??? ?? ?? ?? BSDF 
  • ?? ?? ? ??? TIS (??, ??, ?? ??)

What solution does 草榴社区 offer for measuring BSDF?

草榴社区? BSDF ??? ?? ?? ???? ?????? 

 

BSDF? ???? ???? ???????? ??? ?? ?????? ? ?? ?? ??? ????. 草榴社区? ? ?? ???? ?? ?????. 

Goniophotometer

????? ??? ?? ??

 

??? ??? ??? ??? ??? ???? ?? ??? ???? ???? ???? ???? ??????? (?? ? ?? - ??? ??? ??? ??? ??)? ???? BSDF? ??? ? ????. 

草榴社区? ??? ??????? ???? ?????. 草榴社区 REFLET 180S ? High Specular Bench.

草榴社区 REFLET 180S and 草榴社区 High Specular Bench | 草榴社区

草榴社区 High Specular Bench? ?? ??? ????, ??? ?? ?? ??? ?? 草榴社区 ??? ??? ?? ?? ??? ?? ???? ?????. ???? ????? 草榴社区 REFLET 180S? ???? ? ????. 

  草榴社区 REFLET 180S 草榴社区 High Specular
Type
(????)		 BRDF/BTDFBRDF/BTDF
Dynamic range
(?? ??)		 109 1013
Wavelength range
(??? ??)		 400nm to 1700nm 280nm to 10,6µm
Incident angles
(?? ?? ??)		 Tunable: +90° to -90° Tunable: 90° to 0°
Angular range
(?? ?? ??)		 Full sphere 1 Plan from -10° to +90°
Angular accuracy
(???)		 < 0.1° < 0.02°
Repeatability
(???)		 < 1% < 1%
Weight
(??)		 80 kg 200 kg
Advantages
(???)
  • High dynamic range
  • Very high dynamic range
  • Measurement at 0,002° from the specular
  • High precision
  • High repeatability
  • Customizable wavelength range

Camera-Based System

??? ??? ?? ??

 

??? ??? ??? ?? ???? ??? ?? ?? ???? ??? ??? ?? ?? ??? ???? BSDF? ??? ?? ????. 

草榴社区? ? ?? ??? ?? ???? 草榴社区 Mini-Diff V2? 草榴社区 Mini-Diff VPro? ?? ? ????, ? ?? ?? ??? ? ????. 草榴社区 Mini-Diff VPro(??)? ?? "??" ? ?? ?? ??? ?? ?????. Mini-Diff V2(???)? ?? ???? ?? ??? ? ?? ??? ?? ?????.

草榴社区 Mini-Diff VPro and 草榴社区 Mini-Diff V2 | 草榴社区
  草榴社区 Mini-Diff V2 草榴社区 Mini-Diff VPro
Type
(????)		 BRDF/BTDFBRDF/BTDF
Dynamic range
(?? ??)		 105 BRDF 105
BTDF 106
Wavelength range
(??? ??)		 630nm, 525nm, 465nm, 940nm 630nm, 525nm, 465nm
Incident angles
(?? ?? ??)		 Fixed: 0°, 20°, 40°, 60° Tunable: 0° to 60°
Angular range
(?? ?? ??)		 Sphere [0° ; 75°] [0° ; 360°] Sphere [0° ; 75°] [0° ; 360°]
Angular accuracy
(???)		 1° 0,5°
Repeatability
(???)		 <2% <2%
Weight
(??)		 2 kg 42 kg
Advantages
(???)
  • Plug & play
  • Easy to use & fast
  • Portable & compact
  • Attractive cost
  • Dark Box included
  • Tunable AOI
  • High repeatability
  • Attractive cost

?? ?? ??? ??? ??, ?? ???? ????? ?????? ??? ??? ??? ? ????. 

Optical Scattering Measurements & Equipment

Precision Light Scatter Data for Faster, More Cost-Effective Optical Product Development

Learn More

Example of a vehicle dashboard measurement with the 草榴社区 REFLET 180S and design with LucidShape

草榴社区 REFLET 180S? LucidShape? ??? ?? ???? ?? ? ?? ?? 

 

??? ???? ??? ?? ??? R&D?? ?? ??? ???? ??? ?? ?? ??? ?? ?? ??? ???? ? ??? ? ????. ??? ???? ??? ?? ? ??? ??? ??? ?? ??? ? ?? ???? ??? ???? ????.

?? ??? ?? ? ???? ??? ??? ???? ?? ????? ? ?? ???(AOI=10°/30°/50°/70°)? ?? BRDF? ?????. 

Example of a dashboard measurement with 草榴社区 REFLET 180S | 草榴社区

? ?? ?? ? ???? ??? ?? ? ???? ??? ???? ?????? ????.

?????? ??? ????? ??? ???? 1? ? ??? ??? ?? ??? ???? 2? ? ?? ??? ??? ????? ?????? ???? 2? ? ????? ?? ?????.

?? ???? ?? ?????? ??? ? ?? ?? ??? ? ???? ???? LucidShape?? ?????? ??? ? ????.

LucidShape simulation | 草榴社区

LucidShape? ???? ???? ?????? ???? ??? ??? ??? ? ????: ???? 1? ???? ? ??? ???? 2? ???? ? ???? ???? ???? 2? ???? ???? ? ?? ? ????.

???? BSDF? ?? ???? ??? ?? ?? ??? ???? ??? ???? ???? ????? ?? ??? ??? ? ????.