Custom Optical Filters

We are able to provide customized coating for below products

  • Bandpass Filter: CWL 193nm - 2500nm
  • Shortpass Filter: CutOff 360-1600nm
  • Longpass Filter: Cuton 360-1600nm
  • Dichroic Mirror: R/T operate in 254-2500nm
  • Neutral Density Filter: Reflective /Absorption Type

Need a custom CWL, FWHM, size, or blocking range?

Send your bandpass filter requirement and we’ll review a suitable custom option.

Get custom filter quotation

Optical Filter Manufacturing Capability

Design

Coating designs are reviewed based on wavelength, bandwidth, transmission, blocking range, AOI, substrate, and quantity requirement.

Substrate Processing

Optical glass, fused silica, silicon, or other substrates can be prepared to the required size, thickness, and surface quality.

  • Borosilicate Glass
  • UVFS
  • Silicon

Optical Coating

Dielectric thin-film coatings are deposited to achieve the required passband, edge wavelength, reflection band, blocking range, or optical density.

  • E-Beam
  • IAD E-Beam

Dicing & Custom Cutting

After spectral verification, coated substrates are diced or cut into round, square, rectangular, or custom-sized filters for final use.

  • Dicing (minimum 3x3mm)
  • Rounding (minimum dia5mm)

Spectral Inspection

The coated filters is measured after coating. We will sample testing full spectrum, and run 100% testing for the area of transmission.

  • Cary5000 : 190-3300nm
  • Angle Testing Module

Inspection & Assembly

Finished filters are checked for dimensions, surface condition, and mounting requirements. Filters can be supplied unmounted or assembled into threaded mounts, filter cubes, or other mechanical formats.

  • Standard Metric / Imperial Mountings
  • Customized 3D Printing / CNC housing

Bandpass Filter Projects

Graph showing transmission versus wavelength with a peak at around 600 nm.

BP605-60 Bandpass Filter

  • CWL 605nm
  • FWHM 60nm
  • OD4 @ 200-1200nm

BP625-20 Bandpass Filter

  • CWL 625nm
  • FWHM 20nm
  • OD6 @ 200-1100nm

BP850-20 Bandpass Filter

  • CWL 850nm
  • FWHM 20nm
  • OD5 @ 200-1100nm
Graph showing transmission versus wavelength with a peak at around 1000 nm.

BP905-10 Bandpass Filter

  • CWL 905nm
  • FWHM 10nm
  • OD4 @ 200-1200nm
Transmission spectrum graph of a bandpass filter with peak at 1064 nm and transmission around 0.9 at this wavelength.

BP1064-100 Bandpass Filter

  • CWL 1064nm
  • FWHM 100nm
  • OD4 @ 200-1200nm
Spectral transmission graph with a peak at around 400 nm on a white background

BP420-10 Bandpass Filter

  • CWL 420nm
  • FWHM 10nm
  • OD6 @ 200-1100nm
Graph showing transmission versus wavelength with a peak at around 1500 nm.

BP1550-10 Bandpass Filter

  • CWL 1550nm
  • FWHM 10nm
  • OD4 @ 200-1750nm
Spectral transmission graph with a peak at around 400 nm on a white background

BP460-10 Bandpass FIlter

  • CWL 460nm
  • FWHM 10nm
  • OD4 @ 200-1200nm
A graph showing the transmission levels across different wavelengths for a bandpass filter with a central wavelength (CWL) of 750nm and a bandwidth of 50nm.

BP750-50 Bandpass Filter

  • CWL 750nm
  • FWHM 50nm
  • OD5 @ 200-1100nm

BP254-10 Bandpass Filter

  • CWL 254nm
  • FWHM 10nm
  • OD4 @ 200-1200nm

Longpass / Shortpass Filter Projects

SP505 Shortpass Filter

  • Cutoff 505nm
  • OD3 @ 520-1000nm

LP600 Longpass Filter

  • Cuton 600nm
  • OD3 @ 200-580nm

LP830 Longpass Filter

  • Cuton 830nm
  • OD4 @ 200-815nm

SP650 Shortpass Filter

  • Cutoff 650nm
  • OD5 @ 665-1100nm

Workflow for Custom Project

Try a Stocked Filter

More than 800 types of filters are in stock for testing. Highly recommend to try what we have in stock, then do adjustment based on the result of testing.

Discussion with us

After you tested with the stocked product, please let us know the result and the goal you are trying to achieve.

We will help you adjusting coating design to make it a good balance between price and quality.

Batch Production

Generally it will take 4-6 weeks for finishing a customized coating project.

Upon Finishing the coating, we will share you the transmission curve for confirmation before the shipment.

Custom Optical Filter FAQ

Can you make custom optical filter sizes?

Yes. Custom optical filters can be supplied in round, square, rectangular, and other cut formats depending on the substrate, coating area, and final dimensions required.

Can you match an existing filter specification?

Yes. You can send an existing datasheet, drawing, transmission curve, or part number. We will review whether a similar optical performance can be manufactured or approximated.

Can I test a stock filter before starting a custom project?

When suitable, yes. If an existing or near-match filter can help validate your optical direction, we may recommend testing it before moving to a custom coating project.

Can you provide mounted optical filters?

Yes. Filters can be supplied unmounted or assembled into threaded mounts, non-threaded retaining-ring mounts, filter cubes, filter wheels, or other mechanical formats upon request.

Can you provide spectral test data?

Yes. Transmission, blocking, edge position, or reflection data can be provided depending on the filter type and required measurement range.

What is the typical lead time for custom optical filters?

Most custom optical filter projects take around 4–8 weeks, depending on coating complexity, substrate preparation, size, quantity, inspection requirements, and assembly needs.

What is the MOQ for custom optical filters?

MOQ depends on the filter type, coating design, substrate size, and final dimensions. For many custom coating projects, small-batch production is possible, but prototype and repeat-order economics should be reviewed case by case.

What information should I send for review?

Please send the filter type, wavelength target, bandwidth or edge wavelength, blocking range, transmission requirement, AOI, size, thickness, quantity, and any drawing, curve, datasheet, or system information available.

Need a quotation for your new projects?

Request quote for Custom Optical Filters