Knowledge

An extensive collection of optical design, engineering resources, and application notes to support your work

Broad Bandpass Filters

Broad Bandpass Filters | High Transmission Optical Filters

Broad bandpass optical filters with ≥90% transmission, OD≥3 blocking, low temperature drift, and custom CWL/FWHM options.
Shortpass Filter

What Is a Shortpass Filter?

Learn how shortpass filters transmit shorter and block longer wavelengths, how to select cut-off wavelength, OD, size, and coating.
Longpass filter

What Is a Longpass Filter?

Learn what a longpass filter is, how it works, and how optical cut-on filters are used in imaging, fluorescence, biometrics, color measurement, environmental monitoring, and custom optical systems.
Bandpass Filter

What Is a Bandpass Filter?

Bandpass filters transmit selected wavelength ranges while blocking unwanted light. Explore narrow, broad, multi-band and custom optical filter solutions.
Chalcogenide Glass

What Is Chalcogenide Glass for Infrared Optics?

Learn how chalcogenide glass and IRG materials are used for infrared lenses, molded optics, coatings, and alternatives to germanium.
What Is a CaF₂ Calcium Fluoride Window

What Is a CaF₂ Calcium Fluoride Window?

Learn what a CaF₂ Calcium Fluoride window is, where it is used, and why it is commonly selected for UV, visible, infrared, laser, spectroscopy, and optical instrument applications.

ZnSe vs ZnS for Infrared Applications: Simple Guide

Compare ZnSe vs ZnS for infrared applications, including CO₂ laser optics, IR windows, lenses, domes, material grades and coatings.
What Is a ZnS Optical Window

What Is a ZnS Optical Window?

Learn what a ZnS optical window is, where it is used, and the difference between Optical Grade ZnS and Multispectral ZnS for infrared and optical applications.
What Is a ZnSe Window

What Is a ZnSe Window Used For?

Learn what a ZnSe window is and how it is used in infrared systems, CO₂ laser equipment, thermal imaging, sensors, and custom optical applications.
Infrared Optical Material

How to Choose the Right Infrared Optical Material | IR Windows & Components

Compare infrared optical materials including Silicon, ZnSe, ZnS, Sapphire, CaF₂, BaF₂, and Chalcogenide Glass for IR windows, lenses, domes, and thermal imaging systems.
convex chalcogenide IRG glass

IRG + DLC vs Germanium + DLC: Cost vs Performance
chalcogenide

Can Chalcogenide Replace Germanium? (With DLC Coating)
Optical Components Coated with DLC coating

Germanium vs Chalcogenide (IRG) with DLC Coating
chalcogenide Glass

DLC Coating on Chalcogenide Glass (IRG) for Infrared Optics
Medium-Wave Cooled Fixed-focus Lens

Cooled vs. Uncooled Thermal Cameras: Key Differences