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Table of Contents

Definition

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

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

Formula BSDF | Synopsys

?? ??

  • L: ??? ???? ?? ?? ??
  • E: ?? ???? ?? ?? ??
  • ¦«: ??
BSDF, input light, and observer direction | Synopsys

??? ? ??? ????? ?? ? ??? ????, 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 Synopsys offer for measuring BSDF?

Synopsys? BSDF ??? ?? ?? ???? ?????? 

 

BSDF? ???? ???? ???????? ??? ?? ?????? ? ?? ?? ??? ????. Synopsys? ? ?? ???? ?? ?????. 

Goniophotometer

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

 

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

Synopsys? ??? ??????? ???? ?????. Synopsys REFLET 180S ? High Specular Bench.

Synopsys REFLET 180S and Synopsys High Specular Bench | Synopsys

Synopsys High Specular Bench? ?? ??? ????, ??? ?? ?? ??? ?? Synopsys ??? ??? ?? ?? ??? ?? ???? ?????. ???? ????? Synopsys REFLET 180S? ???? ? ????. 

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

Camera-Based System

??? ??? ?? ??

 

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

Synopsys? ? ?? ??? ?? ???? Synopsys Mini-Diff V2? Synopsys Mini-Diff VPro? ?? ? ????, ? ?? ?? ??? ? ????. Synopsys Mini-Diff VPro(??)? ?? "??" ? ?? ?? ??? ?? ?????. Mini-Diff V2(???)? ?? ???? ?? ??? ? ?? ??? ?? ?????.

Synopsys Mini-Diff VPro and Synopsys Mini-Diff V2 | Synopsys
  Synopsys Mini-Diff V2 Synopsys 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¡ã, 20¡ã, 40¡ã, 60¡ã Tunable: 0¡ã to 60¡ã
Angular range
(?? ?? ??)		 Sphere [0¡ã ; 75¡ã] [0¡ã ; 360¡ã] Sphere [0¡ã ; 75¡ã] [0¡ã ; 360¡ã]
Angular accuracy
(???)		 1¡ã 0,5¡ã
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 Synopsys REFLET 180S and design with LucidShape

Synopsys REFLET 180S? LucidShape? ??? ?? ???? ?? ? ?? ?? 

 

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

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

Example of a dashboard measurement with Synopsys REFLET 180S | Synopsys

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

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

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

LucidShape simulation | Synopsys

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

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