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.
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
Sphericaltolerance | 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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