Optical Windows Filter Coating Optical Glass IR 940 Filter Infrared

We provide all kinds of customized optical lens which according to your drawings, sample products or detailed requirements. Any inquiry please feel free to contact us, thanks!
 

We offer custom dimensions, forms, and specifications as needed by the client. The selection includes over 60 varieties, such as those within the visible spectrum starting at 200 nm and beyond:

• 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
• Neutral density filters, which have a virtually constant transparency especially in the visible range
• Conversion filters, which due to their spectral range increase or reduce the colour temperature of radiation sources

Materials

• Basic glass
• Ionically coloured glass
• Colloidally coloured glass

Forms of Supply for optical Glass Filters

• Polished filter:
  Filters can be supplied as smooth plates or circular discs featuring finished edges. They may also be heat-treated and/or fitted with protective or anti-reflective finishes, if needed
• Filter glass prepared:
  - With processessed edges
  Rectangular plates and round discs with matt surfaces and processed edges - Edges not processed
  Rectangular plates and round discs with matt surfaces and edges not processed.
• Standard formats with non-processed edges:
  Plate sizes 165 x 165 + 3-0 mm
  Plate thickness 3.5 mm +/- 0.5 mm and 4.5 mm +/- 0.5 mm

Specifications
Dimensions: from 1 mm - 480 mm
Minimum thickness 0.1 mm
Tolerances Up to 0.001 mm
Surface quality Up to P 4 in compl. With DIN IS0 100110

Upon request, we can produce any size and thickness required within the framework of the maximum size permitted by the type of glass required.

Applications
Optical glass filters find use across numerous fields. They play a vital role in industrial monitoring, automation, and management systems, supporting analytical techniques in manufacturing, R&D, and environmental safety, as well as in medical settings, by selectively allowing or restricting certain wavelengths of light.

Filter Glass Types

• UG Black and blue glass which permits the transmission of UV light
• BG Blue, blue-green and bandglass
• VG Green glass
• GG Yellow glass which permits IR light transmission
• OG Orange glass which permits IR light transmission
• RG Red and black glass which permits IR light transmission
• NG Neutral glass with virtually constant radiation weakening in the visible range
• N-WG Colourless glass with different cut-off positions in the UV range and which allows IR and visible light transmission
• KG Virtually colourless glass with high transmission of visible light and absorption of radiation in the IR range
• FG Blue and brown coloured glass (conversion glass)

Cylindrical lens Employed to compensate for astigmatism within optical setups, and in rangefinders, to induce astigmatism by elongating a light spot into a line. Commonly found in barcode readers, lens assemblies, and various other optical configurations.

1 . Correcting Astigmatism

Cylindrical lenses play a key role in eye care, especially for treating astigmatism. Astigmatism typically arises from an irregularly shaped cornea. This irregularity causes light to focus at varying points along different directions. By applying a cylindrical lens, the focus along one direction can be adjusted so it aligns with the focus along the other direction.

2 . Laser Line Scanning

A method designed to convert the three-dimensional form of an object into a digital model. Widely applied in industries such as production, design, outdoor planning, and building. This process tracks how a straight beam generated by a cylindrical lens bends upon hitting a curved or uneven surface. Through camera systems and triangulation, the shift in the laser line’s form is captured, allowing for an accurate reconstruction of the object’s geometry. For further details on Laser Line Scanning, feel free to drop a comment.

3. Laser Scanning Microscopy

Often paired with acousto-optic deflectors, the focal position of a tunable lens (the acousto-optical components) shifts horizontally without requiring moving components. The cylindrical lens adjusts the image and ensures the light beam is directed accurately to the intended plane in laser scanning microscopy.