About us

KUPO Optics was founded in 1992, aiming at offering the finest quality of optical coatings and filters. Thanks to uncompromising to the product criteria, we have been established an excellent reputation in professional optical filter industry.

State-of-the-art Facilities

We keep investing in the state-of-the-art production equipment including planetary coating, accurate linear and laser cutting machine, high resolution spectrometers and the likes. Those advanced facilities makes filters and coatings perfectly and precisely.


Wide Range Applications

KUPO Optics manufactures optical filters and coatings for wide range of application including medical, fluorescence, machine vision, astronomy, defense systems, entertainment, and more.


Flexibility and Customization

We stock abundant and diverse filter inventory to fulfill rush order. Our experienced R&D team is also happy to provide customized filters that meet your most demanding requirements.


KUPO Dichroic Filter

KUPO optical filters are renowned for their precision and constituency due to the excellent work of our coating chambers with planetary revolution and the assistance of the Ion Assistant Deposition (IAD). Base on MIL-M-13508C regulations, the rigorously strict manufacturing process creates filters that strongly resist the damage from abrasion, humidity, and flaking. The performance never degrades.

Our procedures are completely in accordance with the ISO 9001 to ensure quality uniformity, making filter at narrow tolerance, within ±1.5% at T50%. KUPO Optics is dedicated in pursuing the visualization of any possibilities through continuous research and development. We are relentless in our commitment to provide quality products and better service to our customers.

We dedicates ourselves to ensure product quality and customer satisfaction. Please contact us if you have any inquiries, your requests are always welcome and will be addressed as soon as possible.


Bandpass Filters

Bandpass filter is the simplest yet and the most economical method to transmit the light with certain wavelength while block the unwanted radiation. 

Bandpass filter is the glass substrate coated with multiple layers of dielectric thin films that interfere the transmission of the light. Currently we have bandpass filter that transmit 365 / 650 / 780 / 850 / 940nm radiation, and are popular in optical inspection and detection.
If other type of bandpass filter is required, please contact us for more detail.
KUPO Dichroic/ Bandpass Filters


● Perfect piece-to-piece, batch-to-batch consistency
● Great transmission of the required radiation
● Great blocking of unwanted radiation

Examples of Applications

● Machine Vision
● Image Sensor
● Automated Optical Inspection

General Specification

● Available Substrate: See Glass Substrates under Products Page
● Humidity, Adhesion, and Abrasion: MIL-M-13508C
KUPO Dichroic/ Bandpass Filters

Bandpass Filters 365nm

KUPO Dichroic/ Bandpass Filters

Optical Specification

Bandpass 365nm:
300~320nm Tavg<1%
340~370nm Tavg>80%
400~700nm Tavg<1%

Bandpass Filters 650nm

KUPO Dichroic/ Bandpass Filters

Optical Specification

Bandpass 650nm:
400~550nm Tavg<3%
620~670nm Tavg>90%
710~800nm Tavg<3%

Bandpass Filters 780nm

KUPO Dichroic/ Bandpass Filters

Optical Specification

Bandpass 780nm:
400~740nm Tavg<1%
775~785nm Tavg>85%
820~1100nm Tavg<1.5%

Bandpass Filters 850nm

KUPO Dichroic/ Bandpass Filters

Optical Specification

Bandpass 850nm:
400~760nm Tavg<2%
840~860nm Tavg>90%
920~1100nm Tavg<2%

Bandpass Filters 940nm

KUPO Dichroic/ Bandpass Filters

Optical Specification

Bandpass 940nm:
400~830nm Tavg<1%
930~950nm Tavg>90%
1050~1100nm Tavg<2%