Color Correction & Temperature Filters
Dichroic color filter coatings are an excellent alternative to dyed plastics and glass when a beam of light must be split into two distinct beams varying by wavelength. Color correction filters alter the overall color of light to achieve a specific color and sometimes to obtain a specific color temperature. Unlike plastic color gels which age and breakdown quickly during use, dichroic filters and color correction filters are designed to stand up to the heat and UV energy in high energy light sources. High energy light sources can also have a damaging effect on dyed glasses as well, due to their heat absorbing nature.
Dichroic and color correction filters have the advantage of reflecting unwanted light instead of absorbing the energy, which allows dichroic filters to be used with much higher intensity light sources up to 550°F.
Dichroic color filters are used in a variety of applications including architectural, entertainment, scientific instruments, and engineering. Many industry standard colors have been engineered as dichroic filters.
We have over 160 different colors available. Dichroics are offered from 1.1mm (.043”) thick up to 3.3mm (1.28”) thick.
Standard Additive Blue Filter Coating
The Standard Additive Blue Filter color coating has an average transmittance more than 85% from 390-480nm, 50% point at 505nm ±15nm, and average transmission less than 1% from 540-750nm at normal incidence.
Standard Additive Green Filter Coating
The Standard Additive Green Filter color coating has an average transmittance less than 1% from 400-460nm, 50% point at 505nm ±15nm, peak transmission at more than 70%, 50% point at 575nm ±15nm and average transmittance less than 1% at 610-710nm at normal incidence.
Standard Additive Red Filter Coating
The Standard Additive Red Filter color coating has an average transmittance less than 1% from 390-550nm, 50% point at 605nm ±15nm and average transmittance more than 75% from 620-730nm at normal incidence.
Standard Subtractive Cyan Filter Coating
The Standard Subtractive Cyan (Anti-Red) Filter color coating has an average transmittance more than 85% from 400-550nm, 50% point at 590nm ±15nm and average transmittance less than 1% from 640-720nm at normal incidence.
Standard Subtractive Yellow Filter Coating
The Standard Subtractive Yellow (Anti-Blue) Filter color coating has an average transmittance less than 1% from 410-475nm, 50% point at 515nm ±15nm and average transmittance more than 85% from 550-750nm at normal incidence.
Standard Subtractive Magenta Filter Coating
The Standard Subtractive Magenta (Anti-Green) Filter color coating has an average transmittance more than 80% from 380-470nm, 50% point at 485nm ±15nm, average transmittance less than 1% from 535-565nm, 50% point at 615nm ±15nm and average transmittance more than 80% 655-750nm at normal incidence.
Color Temperature Blue Filter Coating
A variety of standard color correcting filters are available including Color Temperature Blue (CTB). A Full CTB filter converts a 3200K light source to 5500K. Most filters are stocked in 24″ diameter x 3.3 mm thick Borofloat®. Additionally, CTB filters are available in shades with lesser color temperature shift.
Color Temperature Orange Filter Coating
Another standard color correcting filter is Color Temperature Orange (CTO). A Full CTO filter converts a 5500K light source to 3200K. Most filters are stocked in 24″ diameter x 3.3 mm thick Borofloat®. CTO filters are also available in shades with lesser color temperature shift.
At Abrisa Technologies, we have over 160 different standard dichroic color in stock. These long lasting filters can withstand up to 550°F. All dichroics are 1.7mm (0.69) thick unless noted and are on SCHOTT Borofloat®.
Solid Colored Glass – can be heat treated up to 6″ in diameter for added heat resistance, 1/8″ thick. If high heat resistance is needed use dichroics.