Opto Sigma

These spherical concave substrates are used to make spherical concave mirrors for laser beam concentration and quality imaging. All spherical concave mirror substrates have a focal length equal to half their radius of curvature. The front concave spherical section is polished to ½ λ. on a BK7 substrate. The spherical concave mirrors are offered as a catalog product with aluminum coating. Other reflective coatings are available; please see High Reflective Coatings for other thin film coatings that meet your requirements.

• Broad transmission spectrum
• Thermal stability
• Scratch resistant
• Round, square and rectangular sizes available

When the broadest transmission spectrum is required (from 185nm to over 2 microns) together with high durability, all for a reasonable cost, these windows are ideal. Fused silica is physically robust and resists chipping and scratches. The coefficient of thermal expansion is quite low, so these windows maybe subjected to higher levels of thermal shock than glass or sapphire can withstand. Circular, square and rectangular shapes available.

• Broad transmission spectrum
• Thermal stability
• Scratch resistant
• Round, square and rectangular sizes available

When the broadest transmission spectrum is required (from 185nm to over 2 microns) together with high durability, all for a reasonable cost, these windows are ideal. Fused silica is physically robust and resists chipping and scratches. The coefficient of thermal expansion is quite low, so these windows maybe subjected to higher levels of thermal shock than glass or sapphire can withstand. Circular, square and rectangular shapes available.

• High quality optical glass
• Economical
• Suitable for Anti-Reflection coating

These superior glass windows are made from the best quality BK7. This material is very homogeneous and free from internal defects. The windows are precision polished on both surfaces and held parallel to ≤3arcmin. λ/10 transmitted wavefront distortion is usually preferred but λ/4 is offered as an option when this is not an issue. Anti-Reflection coatings can be applied to these windows for a small additional cost.

• High quality optical glass
• Economical
• Suitable for Anti-Reflection coating

These superior glass windows are made from the best quality BK7. This material is very homogeneous and free from internal defects. The windows are precision polished on both surfaces and held parallel to ≤3arcmin. λ/10 transmitted wavefront distortion is usually preferred but λ/4 is offered as an option when this is not an issue. Anti-Reflection coatings can be applied to these windows for a small additional cost.

• High quality optical glass
• Economical
• Suitable for Anti-Reflection coating

These superior glass windows are made from the best quality BK7. This material is very homogeneous and free from internal defects. The windows are precision polished on both surfaces and held parallel to ≤3arcmin. λ/10 transmitted wavefront distortion is usually preferred but λ/4 is offered as an option when this is not an issue. Anti-Reflection coatings can be applied to these windows for a small additional cost.

•  Low scattering substrates are precision polished on both surfaces
• Surface roughness is <2 angstroms
• Available as parallel or wedged substrates 

• Precision optical flats
• Reference surfaces to λ/20
• Standard diameters from 30mm to 150mm

These are precision polished, uncoated optical flats of fused silica or Zerodur®. They are used as optical reference surfaces in the laboratory and on the production floor. The Zerodur® substrates exhibit essentially a zero coefficient of thermal expansion over a fairly wide ambient temperature range and are therefore the most stable substrate avilable. However, the thermal expansion of fused silica is also quite low. If these flats are going to be used in a stable thermal environment then, fused silica will be adequate.

Each is supplied in a protective box and is provided with an interferogram showing the exact measured flatness of the master surface.

They are polished flat to λ/20 @633nm and parallel within 3arcmin.

• Fused Silica - BK7, Pyrex, Zerodur™
• Borosilicate Glass for low expansion applications
• Single or double surface polish
• Super-polish minimizes subsurface damage for high power laser use
• Standard diameters from 10mm to 152.4mm

Laser components require highly polished substrates as well as high performance coatings. Scattering of laser light, or worse, laser damage can occur if the substrate is made of inferior material or if it is inadequately polished. Although our coatings may be applied to a wide variety of substrates, we offer a popular selection of laser grade optical substrates.

Ultra-Violet grade synthetic fused silica provides the best Ultra-Violet and visible transmission characteristics and is a highly durable material. It is recommended for short wavelength applications. Laser grade BK7 optical glass is the most commonly used material for laser mirrors and windows. For applications where low thermal expansion is important we offer a range of pyrex and Zerodur™ substrates also.

Our standard substrates have a laser polish on one surface and a commercial polish or ground on the back surface. We also offer “window” substrates which are laser polished on both surfaces. These should be selected for transmitting applications such as beamsplitters.

The polishing techniques we use produce a super polish with a surface roughness of 5 to 10 Angstroms and very low scatter. Material of 6 to 7 times grit diameter is removed during each grind and polish process to ensure very little sub-surface fracturing. This results in a substrate which is capable of withstanding high energy laser radiation.

• Fused Silica - BK7, Pyrex, Zerodur™
• Borosilicate Glass for low expansion applications
• Single or double surface polish
• Super-polish minimizes subsurface damage for high power laser use
• Standard diameters from 10mm to 152.4mm

Laser components require highly polished substrates as well as high performance coatings. Scattering of laser light, or worse, laser damage can occur if the substrate is made of inferior material or if it is inadequately polished. Although our coatings may be applied to a wide variety of substrates, we offer a popular selection of laser grade optical substrates.

Ultra-Violet grade synthetic fused silica provides the best Ultra-Violet and visible transmission characteristics and is a highly durable material. It is recommended for short wavelength applications. Laser grade BK7 optical glass is the most commonly used material for laser mirrors and windows. For applications where low thermal expansion is important we offer a range of pyrex and Zerodur™ substrates also.

Our standard substrates have a laser polish on one surface and a commercial polish or ground on the back surface. We also offer “window” substrates which are laser polished on both surfaces. These should be selected for transmitting applications such as beamsplitters.

The polishing techniques we use produce a super polish with a surface roughness of 5 to 10 Angstroms and very low scatter. Material of 6 to 7 times grit diameter is removed during each grind and polish process to ensure very little sub-surface fracturing. This results in a substrate which is capable of withstanding high energy laser radiation.

• Fused Silica - BK7, Pyrex, Zerodur™
• Borosilicate Glass for low expansion applications
• Single or double surface polish
• Super-polish minimizes subsurface damage for high power laser use
• Standard diameters from 10mm to 152.4mm

Laser components require highly polished substrates as well as high performance coatings. Scattering of laser light, or worse, laser damage can occur if the substrate is made of inferior material or if it is inadequately polished. Although our coatings may be applied to a wide variety of substrates, we offer a popular selection of laser grade optical substrates.

Ultra-Violet grade synthetic fused silica provides the best Ultra-Violet and visible transmission characteristics and is a highly durable material. It is recommended for short wavelength applications. Laser grade BK7 optical glass is the most commonly used material for laser mirrors and windows. For applications where low thermal expansion is important we offer a range of pyrex and Zerodur™ substrates also.

Our standard substrates have a laser polish on one surface and a commercial polish or ground on the back surface. We also offer “window” substrates which are laser polished on both surfaces. These should be selected for transmitting applications such as beamsplitters.

The polishing techniques we use produce a super polish with a surface roughness of 5 to 10 Angstroms and very low scatter. Material of 6 to 7 times grit diameter is removed during each grind and polish process to ensure very little sub-surface fracturing. This results in a substrate which is capable of withstanding high energy laser radiation.

• High durability
• Broad transmission spectrum
• Standard diameters from 10mm to 50mm

When the most durable surface is required these sapphire windows provide the best solution. Sapphire has a very high abrasion resistance and a broad transmission spectrum covering the visible and near infrared regions of the spectrum (200nm to over 2microns).

• BK7, Fused Silica and Excimer Grade Fused Silica
• Available in wedge angles 0.5, 1, 2 and 3 degrees
• Wedge angle used to reduce reflection from rear surface