Dichroic mirror inside LED-illumination module

Bas,

Here are the transmission specifications of the dichroic filters used in the DLP LightCommander

T=transmittance (%)
AOI - angle of incidence of impinging light
pol. - polarization
AR - anti-reflection coating

Blue:
Dichroic/AR
AOI=45, random– pol.
T =< 5% avg 370 – 475* nm
T = 50 % 485* ± 10 nm (Defined as the average of
wavelength of T=25% and T=75%)
T >= 90 % avg 500* – 880 nm
* Indicates that Actual wavelength for transmittance band range limit will
shift with position of corresponding T=50% point.

Red:
Dichroic/AR
AOI=45, random– pol.
T >= 90% avg 370 – 550* nm
T = 50 % 580* ± 20 nm (Defined as the average of
wavelength of T=25% and T=75%)
T <= 5 % avg 605* – 880 nm
* Indicates that Actual wavelength for transmittance band range limit will
shift with position of corresponding T=50% point.

IR:
Dichroic/AR
AOI=45, random– pol.
T =< 5% avg 600 – 650* nm
T = 50 % 750* ± 40 nm (Defined as the average of
wavelength of T=25% and T=75%)
T >= 90 % avg 800* – 880 nm
* Indicates that Actual wavelength for transmittance band range limit will
shift with position of corresponding T=50% point.

The filters used in the LC are from Oerlikon Optics.

The optical design of the illumination module does not require a "green" filter.

Best regards,

Pascal