Optical Filters

OPTICA ‘ s filter are designed for operation at 23 degrees Celsius, these filters can be used throughout the temperature range of -50 to +100 degrees Celsius as long as thermal shock is avoided.

Color Glass Filter

Color glass filters 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. Optica, one of the leading filter glass manufacturers with a wide product range.

Our range of glass filters with more than 60 types includes the following filter types in the visible wavelength range from 200 nm upwards:

Band pass filters, which allow required ranges to pass through selectively.
Long pass filters, which block unwanted shorter wave ranges.
Short pass filters, which block unwanted longer wave ranges.

Color Glass Bandpass Filter are often used for longpass and bandpass filters, coated substrate cemented with color glass which have different absorption and transmission properties across the spectrum.

Dichroic Filter

Optica Dichroic Filters Series have been designed with the assistant of entertainment and architectural lighting designers, which provided a comprehensive selection of consistence shades express perfect images for both interior and exterior applications. Some of the subtle, pale also offer you a unique alternative to create various aesthetic effects for architectural use and characteristic lighting.

OAEPL Dichroic Series provide you the flexibility to choose suitable colors for your projects and the benesfits of absolute spectral stability in addition to excellent resistance to environmental degradation.

Optica Dichroic Filters

28 kinds of standard colors
6 kinds of color correction filters.
Correspond to LEE and ROSCO
Size : 50 x 50 with 1.10mm thickness
Substrate : Borofloat glass material

Technical Specification
Humidity	Adhesion. Abrasion Resistance
Available Glass Substrate	Soda-Lime Glass, Tempered Glass, Borofloat Glass & Borosilicate Glass
Maximum Operation Temperature	Soda-Lime Material : 150 °C, Tempered Material : 250 °C & Borofloat Material : 450 °C
Available Sizes	Square : 7mm – 300mm & Round : 10mm – 450mm
Standard Thickness	1.10mm
Optional Thickness	0.55mm, 1.86mm & 2.86mm
Cutting Tolerance	± 0.1mm
Color Tolerance	± 5nm of Designed Half Height

Long pass and short pass filters are two distinct types of specialized optical filters. Long pass filters transmit electromagnetic radiation with long wavelengths while blocking shorter wavelengths. Short pass filters do the opposite: they pass short wavelengths and block longer ones. Both types are sometimes grouped as edge filters (referring to the steep cut-on and cut-off between transmission and rejection) or barrier filters (due to the rejection of large sections of long or short wavelengths).

Cold Mirror is used to in certain applications where it is desirable to reflect visible light, but transmit the IR (heat energy) to replace the Hot Mirror.

Technical Specification
Long Pass Filter	Long Pass Filters Are Frequently Employed In Fluorescent Spectroscopy. Fluorescence, By Definition, Is The Emission Of Light By A Substance That Has Absorbed Electromagnetic Radiation; The Specific Light Wavelengths Absorbed Are Termed Excitation Light. Because Fluorescence Emitting From An Object Typically Has Higher Wavelengths Than The Excitation Light That Caused It, Long Pass Filters Can Be Used To Pass Only Precise Fluorescence Wavelengths While Blocking Leakage From The Excitation Lamp.	Soda-Lime Glass, Tempered Glass, Borofloat Glass, Borosilicate Glass
Short Pass Filter	Short pass filters are used in Raman spectroscopy.
Cold Mirror	Medical Illumination Projection System Photo Copies Reflector Scanner
Hot Mirror	Digital photography

Interference Filter

Filter	Application	Material
Flouresence Filter	This is broadly utilized in biotechnology and analytical applications due to its extraordinary sensitivity, high specificity, and simplicity.	Soda-Lime Glass, Tempered Glass, Borofloat Glass, Borosilicate Glass
Narrow Bandpass Filter	Water And Environmental Testing, Clinical Chemistry, Colorimetry, Photometry, Lasers, Color Sorting ,Sensing And Detecting.	Boroflat
Laser Line Filter	Flat-Top Narrowband Filters Are Ideal For LIDAR, Raman Spectroscopy, And Other Applications That Require The Use Of Precision Laser Transmitting Filters Or Laser Cleanup Filters.	Soda-Lime Glass Tempered Glass Borofloat Glass Borosilicate Glass

Interference Filter
Specification	Grade
Mount Diameter	10mm To 25.4mm +0/-0.2mm
Clear Aperture	>80%
Thickness	<10mm
CWL Tolerance	±2nm
FWHM	10nm
Peak Transmission	>45%
Block	<0.01%(X Ray To 1100nm)
CWL Shift	<0.02nm/℃

Narrow Bandpass Interference Filter
Specification	Grade
Central Wavelength (CWL) Tolerance	±2nm
Full Width-Half Maximum (FWHM)	10nm
Operating Temp.Range	-10° C To +70° C
Surface Quality	80-50
Block	<0.01%(X Ray To 1100nm)

Neutral Density (ND) Filters

Neutral density (ND) filters uniformly attenuate the intensity of light over a broad spectral range. Optical Density (OD), is achieved by either absorption using glass or by a combination of absorption and reflection metallic coating. Neutral density filters can attenuate spectral regions selected from 250 to 2500nm. Optical Density can be from 0.04 to 4. These are additive hence ND filters can be stacked to achieve the desired OD level.

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