Spectral function
Select bandpass, longpass, shortpass, neutral-density or dichroic behavior from the transmitted and rejected regions.
PRODUCT FAMILY
Dichroic & Thermal Filters
Dichroic and thermal filters separate visible and infrared energy through wavelength-selective reflection and transmission.
Cold-mirror and heat-reflecting families help manage detector exposure, illumination heat load and multispectral beam routing.
Related families
SELECTION PRIORITIES
Choose dichroic & thermal filters around the optical requirement
2 product families are available. Use the engineering filters below to narrow the catalog before comparing exact models.
Passband and blocking
Compare center or cutoff wavelength, bandwidth, optical density and out-of-band blocking as a complete requirement.
Format and angle
Confirm substrate size, clear aperture and incidence angle because interference-filter edges shift when the filter is tilted.
PRODUCT FINDER
Dichroic & Thermal Filters
Compare product families, then open a family to select the exact model, dimensions and coating.
2families found
No matching product families on this page
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SELECTION QUESTIONS
Dichroic & Thermal Filters FAQ
Technical answers to the questions that most often affect model selection.
Which filter type fits my optical system?
Bandpass filters isolate a spectral region, longpass and shortpass filters define a cutoff edge, neutral-density filters attenuate optical power, and dichroic or thermal filters separate visible and infrared energy. Choose by the required transmitted and rejected bands.
What do center wavelength, FWHM and blocking mean?
Center wavelength locates the passband, full width at half maximum describes its usable width, and blocking defines how strongly out-of-band light is suppressed. All three must be evaluated together rather than selecting from center wavelength alone.
Does angle of incidence change filter performance?
Yes. Interference-filter edges and passbands generally shift as angle of incidence changes, and the response may differ for s and p polarization. Use the specified design angle or request a review when the filter will operate at a significant tilt.
Need a different diameter, tolerance or coating?
Send your material, wavelength, dimensions and quantity for review.
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