|
|
Color Filters
Product Information
|
Colored and filter glass stands out due to its selective absorption in the visible wavelength range. The filters appear to be colored if their filter effect lies within the visible light spectrum.
SCHOTT Advanced Optics, one of the leading glass manufacturers with a product range equaled by no other manufacturer world-wide, can provide any size, shape and quality required by the customer.
In order to develop an assortment of filter glasses, some with extreme filter properties, in the largest possible spectral area, numerous colorants with different concentrations and many different base glasses have been developed. Our filter glasses are classified into the following filter groups:
|
|
- UG:
|
|
Black and blue glasses, UV transmitting
|
|
- BG:
|
|
Blue, blue-green, and multi-band glasses
|
|
- VG:
|
|
Green glass
|
|
- GG:
|
|
Nearly colorless to yellow glasses, IR transmitting
|
|
- OG:
|
|
Orange glasses, IR transmitting
|
|
- RG:
|
|
Red and black glasses, IR transmitting
|
|
- NG:
|
|
Neutral density glasses with uniform attenuation in the visible range
|
|
- N-WG:
|
|
Colorless glasses with different cutoffs in the UV, transmitting in the visible range and the IR
|
|
- KG:
|
|
Virtually colorless glasses with high transmission in the visible and effective absorption in the IR (heat protection filters)
|
|
|
Band pass filters -
|
|
selectively transmit a desired wavelength range
|
|
Long pass filters -
|
|
Block an undesired shorter wavelength range
|
|
Short pass filters -
|
|
Block an undesired longer wavelength range
|
|
Neutral density filters -
|
|
Exhibit nearly constant transmission, especially in the visible range
|
|
Benefits
|
Optimal filter solutions can be offered. All filter glass types can be used as substrates for thin film coating to manufacture so-called interference filters. Thus the specific advantages of the individual components (absorption properties of optical glass filters and the reflection properties of interference coatings) can be combined in one optical filter.
Advanced Optics is also the preferred supplier of colored glass filters because of its:
- Experience with high demands on surface quality, fitting errors, small thickness and small thickness tolerances when manufacturing complex types of glass
- In-house optical and protection coating capabilities
- Ability to accommodate special requirements via close collaboration and development efforts between our customers and our application engineering team
|
Key Applications
|
Optical glass filters are important components in transmitting and blocking certain specific spectral ranges and are used in widely differing application areas:
- Industrial measurement
- Regulation
- Control technology
- Analytical measurement methods in production, research and development
- Environmental protection
- Medicine
- Military
KG filters:
- Heat absorption filters / heat protection filters (photocopy machines, slide projectors)
- Components in protective glasses
- Laser safety (windows for lasers)
- Surgery lighting (operating room lamps)
- Dental lighting
- Periscopes (tanks)
N-WG, GG, OG and RG filters:
- Long pass filters
- Blocking filters for shorter wavelengths (interference band pass filters)
OG filters:
- Airport lighting
- Rain sensors (as substrate)
- Laser safety
RG filters:
- Sensor applications
- Infrared lighting technology (object protection)
- (Night) surveillance systems
- Bar code reader
- Airport lighting
- Laser safety
UG filters:
- UV illumination (molecular, finger print, bank note identification)
- UV excitation creating visible luminescence
- Fluorescence microscopy (immuno reactions)
- Sterilization equipment
BG filters:
- Silicon receivers (sensitivity correction)
- Video cameras (matching to human eye response)
- Airport lighting
- Eye sensitivity matching
- Laser safety
|
Materials Used
|
Materials typically used in colored glass filters include basic glass types, ionically colored glass as well as colloidally colored glass.
|
Forms of Supply
|
Filter glass is manufactured and supplied in different thicknesses (from 1 mm to 400 mm depending on raw glass size). By combining different filters together you can achieve additional filter effects.
The polished and cut filters can be thermally toughened for special applications. In consideration of the variety of possible applications, the range of filter glasses is not limited to certain standard sizes and thicknesses. Instead, they can be produced to specification, subject to each individual glass type’s maximum allowable dimensions and thickness.
Polished filters: Filters are supplied in the form of edge-machined, polished plates or discs. The standard polish quality corresponds to a polished surface (P2 according to ISO 10110 Part 8). Higher polish quality is readily available upon request.
Standard format polished filter glasses, edge-machined with dimension of 50 mm x 50 mm (standard size in the US: 50.8 mm x 50.8 mm) ± 0.2 mm with thickness 1 ± 0.1 mm; 2 ± 0.2 mm and 3 ± 0.2 mm can be supplied upon short notice. The described standard formats can be supplied on short notice.
Cut filter glass:
With machined edges: Rectangular plates and round discs with ground surfaces and machined edges.
Without machined edges: Rectangular plates with ground surfaces and without machined edges.
Standard formats without machined edges: Plates with dimension of 165 mm x 165 mm +3/–0 mm with the thickness of 3.5 ± 0.5 mm and 4.5 ± 0.5 mm.
|
Specifications
|
We can custom make according to customer's specifications, according to ISO
10110 as well as according to MIL specs.
- Spectral specifications up to 1 nm accuracy
- Spectral range from 250 nm to 3200 nm
- Optical density: from 0 to 6
- Thickness tolerance: up to 0.001 mm
- Polish: P3 or P4
|
Optical Glass Filters: Catalog
Online Version
|
The online version of our Glass Filters-Catalog contains all types of glass filters including datasheets made by SCHOTT Advanced Optics.
[online catalog]
|
Calculation Program
|
The calculation program is intended to serve as an additional tool
for the glass filter catalog, in order to quickly get an estimation
of appropriate solutions for your individual filter problem.
[Download]
|
Quality Assurance
|
We carry out self-inspection during the production process, random inspection as well as 100% final inspection, depending on the specifications. Spectral values are measured through a spectrophotometer while fitting error measurement is completed with an interferometry.
|
|
Contact
Advanced Optics
SCHOTT AG
Hattenbergstrasse 10 55122 Mainz Germany
 | +49 (0)6131/66-1812 |
 | +49(0)3641/2888-9047 |
E-mail
More contacts
|
