Optical Glass Filters

Optical glass filters offered by Avantier are precision devices made from high-quality glass designed to control and modify the passage of light. These filters find applications in various fields. Common types include color filters, neutral density filters, polarizing filters, UV filters, IR filters, and more. They  are used for enhancing image quality, managing exposure, and achieving specific optical effects. High-quality colored optical glass is utilized to create a variety of filters to meet specific demands.

Types of Optical Glass Filter

Optical glass filters are typically made from high quality optical glass that has been precisely shaped and coated to achieve specific optical properties. They are commonly used in various applications to achieve different effects, enhance image quality, or control the spectral characteristics of light. Here are some common types of optical glass filters:

  • Color Glass Filters: These colored glass filters are used to selectively transmit or block certain colors or wavelengths of light. They are often used in photography and cinematography to adjust the color balance or create artistic effects. Examples include red, blue, and green filters.
  • Neutral Density (ND) Filters: ND filters uniformly reduce the intensity of light entering the lens without affecting its color. They are used to control exposure in photography and videography, allowing for longer exposures or wider apertures in bright conditions.
  • Polarizing Filters: Polarizers reduce glare and reflections from surfaces like water, glass, and shiny objects. They also enhance contrast and saturation in landscape photography by selectively blocking polarized light.
  • Ultraviolet (UV) Filters: UV filters block ultraviolet light that can affect image quality, particularly in high-altitude or coastal environments. They are also used as protective filters for camera lenses.
  • Infrared (IR) Filters: IR filters block visible light and allow only infrared light to pass through. They are used in applications like infrared photography, thermal imaging, and remote control systems.
  • Bandpass and Longpass Filters: Bandpass filters allow a specific range of wavelengths to pass through while blocking others,  making them useful  in fluorescence microscopy and spectroscopy. Longpass filters transmit longer wavelengths while blocking shorter ones.
  • Shortpass Filters: These filters transmit shorter wavelengths while blocking longer ones. They are commonly used in UV photography and fluorescence imaging.
  • Optical Density Filters: These filters are designed to provide a specific level of attenuation or optical density across a broad range of wavelengths. They are commonly used in scientific and industrial applications.
  • Interference Filters: Interference filters exploit the interference of light waves to selectively transmit or reflect specific wavelengths. They are used in spectroscopy, astronomy, and telecommunications.
  • Gradient Filters: Gradient filters are used in photography to balance exposure in scenes with uneven lighting. They gradually transition from clear to a specific filter type (e.g., ND or color) to achieve the desired effect.
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Optical Glass Filters, optical colored glass filters, optical glass filters, Custom Optical Glass Filters, Colored optical glass filters
Optical Glass Filter
Optical Glass Filters, optical colored glass filters, optical glass filters, Custom Optical Glass Filters, Colored optical glass filters
Optical Glass Filter

Name

Type

Name

Type

Name

Type

Sky-light filter

KSY

Fluorescent filter

EC

Six-star-light filter

LX

UV filter

UV

Enhanced color filter

FL

Six-star-light filter

BX

Amber color temperature filter

85A

Low contrast filter

LC

Changeable crossing filter

KS

Blue color temperature filter

80B

Polarized light filter

PL

Two-image filter

DY-2F

Yellow filter

Y

Screen filter

SN

Three-image filter

DY-3F

Red filter

R

Mist filter (five classes)

W-0,1,2,3,4

Four-image filter

DY-4F

Orange filter

O

Crossing filter

SZ

Five-image filter

DY-5F

Green filter

G

Meter filter

MZ

Six-image filter

DY-6F

Planar three-image filter

DY-3PF

Planar six-image filter

DY-6PF

Yellow hole-filter

ZK-J

Rainbow filter

CH

Green hole-filter

ZK-L

Red hole-filter

ZK-H

Mild hole-filter (light)

ZK-R1

Light grey hole-filter

FL

Neutral gray hole-filter

ZK-A6

Mild hole-filter (thick)

ZK-R2

Factory Standards

Spherical

tolerance

λ/4

Diameter

+0, -0.2mm

Surface quality

40-20

Clear aperture

>90%

Radius of curvature

+2%

Bevel

0.2mm x 45° typical

Thickness

>+0.2mm

Material

BK7

Coating

Aluminum, gold, and silver (other coatings available on request)

Custom Optical Glass Filter

Choosing high quality colored optical glass and utilizing advanced processing techniques, we fabricate filters with coated surfaces that meet specific spectral characteristics for all kinds of applications. We offer three kinds of filters (white-black, color and specific application) with over 40 types available at our factory, including sizes like M46, M49, M52,M58 and more. 

Please contact Avantier to discuss special requirements for your custom optical glass filter projects.

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