Optics

An interference filter or dichroic filter is an optical filter that reflects one or more spectral bands or lines and transmits others, while maintaining a nearly zero coefficient of absorption for all wavelengths of interest.

An interference filter may be High-pass, Low-pass, Bandpass, or Band-rejection. Optical interference filters uses the interference effect to obtain spectral transmission are manufactured by depositing thin layers with different refractive indices onto a substrate.

We supply standard and custom filters for customer needs in research and development; Our product range includes various types of optical interference filters

We offer band pass filter with broad blocking and/or an optimized transmittance region. Large blocking and low wave front distortion can be optimized to meet customer demands. .

• Available in UV, Visible, and IR Centre Wavelengths( Standard available CWL range: 400nm-2000nm)
• Excellent temperature stability
• Available in Standard 25.4 mm diameter and 50.8 mm square sizes and also customized sizes as per customer requirement
• Superior lifetime in harsh environmental conditions

Long-wave pass edge filters are specifically designed to transmit longer wavelengths than the cut-on wavelength while rejecting shorter wavelengths using either absorption or reflection. We offer several types of long-pass filters as well as long pass filter sets.

Our supply range also includes Schott long pass filter with the following standard specifications

Short-wave pass edge filters are specifically designed to transmit wavelengths shorter than the cut-off wavelength while rejecting longer wavelengths. We offer standard dielectric coated short pass filters, higher performance dichroic filters and short-pass filter sets.

• Steep cut-off transition slope
• High rejection stop band
• ≥65% transmission shortpass band
• Cut-off wavelengths from 400-1000 nm
• Blocked to 1200 nm

Our supply range of Schott short pass filter comes with the following standard specifications

Neutral Density Filters

A Neutral-Density filter (ND filter) reduces the intensity of a wide spectrum of light equally. We offer standard Nd filters including Absorptive glass Nd filters and reflective metallic ND filters, for the visible/NIR and UV transmitting on glass or fused-silica,

Absorptive Neutral Density Filters

Absorptive Schott glass ND filters are used to control the intensity of light and are stackable without resulting in multiple reflections. The ND glass absorbs the light within the filter. Each glass type is polished to required thickness and measured to produce the exact optical density and transmission. Custom or standard optical densities and transmission can be produced to a particular wavelength. Our standard stocks of Schott or Hoya ND Absorptive Filters are of the following specifications

Reflective coated metallic Nd filters are coated in two glass types. The visible IR range is Nd coated on optical glass to cover 350nm to 2500nm. The UV range is coated on fused silica for use down to 170nm. Please be aware the densities are coated for 550nm, but in the UV this will give up to 40% higher density.

• Mirrors
• Broadband Dielectric Mirrors
• Standard Specifications

Parabolic Mirrors

Typically designed as a segment of a larger parabola, manufactured from a metal substrate such as aluminium and coated in enhanced aluminium, silver or gold as standard. These mirrors focus light similar to a concave mirror with the significant exception being that the off-axis parabolic design redirects the incident light through 90%.

Custom mirrors may be manufactured in a range of substrates and alternative coatings as required by our customer's specifications including UV and IR coatings and materials and alternative reflection angles.

Lenses

• 1. Wide selection of Spherical lenses made of N-BK7, UVFS or CaF2 optical materials,
• 2. Apherical lenses made of N-BK7, UVFS or S-LAH64 optical materials,
• 3. Cylindrical and Conical lenses made of N-BK7 and UVFS.
• 4. Lenses forms plano-convex, plano-concave, biconvex, biconcave, plano-convex cylindrical and plano-concave cylindrical.
• 5. Local lengths vary from -5000 to +10000 mm.

Other specific material, size and anti-reflection (AR) coated lenses are available under custom request

Prisms

• 1. Standard wedge prisms (40-20 scratch & dig, surface flatness λ/4@633 nm),
• 2. Precision wedge prisms (20-10 scratch & dig, surface flatness λ/4@633 nm),
• 3. Laser dispersing prisms made of N-BK7, UVFS or SF11 optical material
• 4. Right angle prisms

we supplies a range of right angle prisms to meet UV-Visible-NIR applications, with high surface quality and tight tolerance angles. Our OEM has full capability of processing right angle prisms based on the materials we proposed above with 3 precision levels fit your actual demand.

Corner cube is total reflecting prism formed by 3 perpendicular surfaces, where the incident light angle does not influence the final emerging light angle but reflected by 180°, it offers excellent parallelism between the incident and exit beams.

We supply both corner cube in mount or without mount, our precision corner cube retroreflectors have been used for Laser ranging, positioning and guidance, laser communication, optical transformation.

Standard Specifications