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　　IR Cut Filter (Cold Filter) - MF-CLD127S

Price / Availability ▼ Applications ▼ Specification ▼ FAQ ▼

MF-CLD127S IR Cut Filter / Cold Filter

Dielectric multilayer glass filter for visible-light transmission and infrared heat reduction

MF-CLD127S is an IR cut filter, also called a cold filter, designed to transmit visible light while reducing infrared radiation and heat load.

It uses dielectric multilayer vapor-deposition coating on polished glass and is intended for optical systems where heat reduction and visible-light clarity are important.

Related products: OCA / Cold Filter category | MCS62 OCA film | M3D49 OCA film

IR cut / cold filter Dielectric multilayer coating 127 x 127 mm t = 2.5 mm Currently out of stock
Availability Notice
MF-CLD127S is currently out of stock, and future continuation of this product is uncertain. Please contact us before planning this filter into a new product, project, optical system or purchasing process. Price, lead time, specification and availability may change without prior notice.
MF-CLD127S IR cut cold filter glass


Transmission spectrum of IR cut filter / cold filter MF-CLD127S

What MF-CLD127S is used for

MF-CLD127S is used when visible light needs to pass through an optical system while infrared radiation and heat load should be reduced.

A cold filter can help protect heat-sensitive optical parts such as polarizers, optical films and display-related components from excessive infrared exposure.

Typical Applications

  • Polarizer heat protection in front of projector light sources
  • 3D projection systems using polarizers or optical films
  • Gel documentation systems where background glow should be reduced
  • Optical assemblies that require visible-light transmission with IR reduction

MF-CLD127S – IR Cut Filter / Cold Filter

■ Transmits visible light while reducing infrared radiation

■ Dielectric multilayer vapor-deposition coating on glass

■ Optical white / polished glass helps reduce color bias and image distortion

■ Useful for reducing heat load to polarizers and other optical films

■ Suitable for projector optics, gel documentation and optical test assemblies

■ Currently out of stock; future supply is uncertain
Item Code Size Availability Unit Price
MF-CLD127S 127 x 127 mm | t = 2.5 mm
Effective area: 120 x 120 mm		 Out of stock $ 332
Reference price

Recommended use cases

MF-CLD127S is suitable for optical systems where infrared radiation from the light source may increase temperature or degrade heat-sensitive optical parts. Actual performance depends on the light source, distance, filter position and thermal environment.

  • Heat-load reduction in front of polarizers used with projector light sources
  • Protection of polarizer films and optical films from infrared heat exposure
  • Gel documentation systems and optical imaging setups
  • Laboratory evaluation of IR reduction in visible-light optical paths
Need an IR cut filter or cold filter?
Please confirm your light source, required filter size, wavelength range and application — send us an inquiry.

Specification of MF-CLD127S IR Cut Filter

Size and Structure

Outer size mm 127 x 127
Effective area mm 120 x 120
Thickness mm 2.5
Substrate Polished / ground optical glass
Coating Dielectric multilayer vapor-deposition coating

Optical Function

Function Visible-light transmission with infrared radiation reduction
Application note Used for reducing infrared heat load in optical paths; not intended to eliminate all heat

Thermal Control Test Example

Light source 250 W halogen lamp
Test distance Light to polarizer distance fixed at 80 mm; cold filter placed between light and polarizer
Room temperature ℃ 23
Measurement note Measured at the center of the polarizer every 60 seconds. Data are measured values, not guaranteed values.
Thermal control effectiveness data for IR cut cold filter Cold filter test setup with halogen lamp and polarizer
Safety Notice / Compatibility Notice
The values and test examples on this page are measured values and are not guaranteed values. They do not guarantee compatibility with every light source, optical system, film, polarizer or installation condition. Please perform evaluation with the actual light source, distance, mounting method and operating environment before use.

FAQ – MF-CLD127S IR Cut Filter / Cold Filter

Q. What is MF-CLD127S?
A. MF-CLD127S is an IR cut filter / cold filter designed to transmit visible light while reducing infrared radiation and heat load.

Q. Is MF-CLD127S currently available?
A. It is currently out of stock, and future continuation is uncertain. Please contact us before planning this product into a new design or purchasing schedule.

Q. What applications is this cold filter used for?
A. It can be used for projector optics, polarizer heat protection, gel documentation and other optical systems that require visible-light transmission with infrared reduction.

Q. Does the filter remove all heat?
A. No. It can reduce infrared heat load, but it does not eliminate all heat. Actual performance depends on the light source, filter position, distance, airflow and installation conditions.

See also: OCA / Cold Filter category | MCS62 OCA film | M3D49 OCA film

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