Concave Mirrors | Convex Mirrors | Cold Mirrors | Hot Mirrors | Front Surface Mirrors

Concave Mirrors - Concave mirrors bulge inward to create real images by converging rays. This reflects light inward to one focal point; therefore they are used to focus light. Unlike convex mirrors, concave mirrors show different image types depending on the distance between the object and the mirror creating an incredible characteristic in that the image location and quality is completely independent of the wavelength. This allows the design of very wide spectral range instruments and does allow a system that will work in the IR to be aligned using visible light.

Convex Mirrors - Convex mirrors bulge outward to create virtual images that are formed by diverging rays; convex mirrors reflect light outwards, therefore they are not used to focus light. Such mirrors always form a virtual image.

Cold Mirrors - Cold mirrors are ideal for illumination systems where high temperature lighting is not desired. Available for an angle of incidence of 0°, the dielectric coating reflects 90% of visible light, while allowing for IR Waves to transmit at 80%.


  • Borosilicate Glass.
  • High transmission for infrared heat.
  • High refection for visible range.
  • Custom configuration/specifications.

Hot Mirrors - Hot Mirrors for optical systems make an intelligent addition for heat excessive concern. Available for an angle of incidence of 0° and applied mainly in illumination and projection systems, the dielectric multi-layer coating on the mirrors reflect harmful infrared heat more efficiently, while allowing the visible light to pass through.


  • Borosilicate Glass allowing for high temperature operations.
  • High transmission for visible range.
  • High refection for infrared heat.
  • Dielectric multi-layer coating.
  • Removes heat more efficiently.
  • Custom configuration/specifications.

Front Surface Mirrors/First Surface Mirrors - A front surface mirror has its reflective part right at its surface so no ghosting will appear. It is made for applications requiring a strict reflection so light can be manipulated in a specific manner.


  • Front mirror is completely opaque with 0% transparency.
  • Mirror-coated glass with a 94-96% reflectance level.
  • Custom specifications available.

Please contact our customer service representatives to discuss your custom glass mirror needs sales@glassdynamicsllc.com.

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