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Mirrors & Beamsplitters

Optical Mirrors

Key Features

  • High performance optics
  • Ready to be ordered

Description

Mirrors are probably the most commonly used optical elements in your lab, and their quality, performance, and reliability are key to the success of your experiment. That’s why we provide a variety of mirrors so you can be assured to find what you need. When choosing an Optical Mirror, keep in mind the reflectivity, laser damage resistance, and coating durability. For quick delivery, all our mirrors are shipped from stock.

Metallic Coatings

Metal mirrors are good general-purpose mirrors because they can be used over a very broad spectral range from 450 nm to 12 µm. They are also insensitive to polarization and angle of incidence, and provide a constant phase shift, making them appropriate for ultrashort-pulse applications. Their softer coating, however, makes them more susceptible to damage, and special care must be taken when cleaning.

Dielectric Coatings

Dielectric mirrors offer higher reflectivity over a broad spectral range of a few 100 nm. Their coating is more durable, making them easier to clean, and more resistant to laser damage. We offer broadband dielectric mirrors that are ideal for general laboratory use as well as mirrors especially for high-power Nd:YAG applications at 1.064 µm and 532 nm and DUV and UV applications.

Ultrashort-Pulse Application Coatings

Dielectric mirror coatings can cause significant dispersive effects for ultrashort pulses. The dispersion of the material and the interference effects between the layers result in rapid phase variations at specific wavelengths. Since the group delay is related to the slope of the phase variation, these wavelength regions introduce significant group-delay errors that can broaden and distort your pulse. Therefore, for applications that require steering ultrashort pulses, such as those produced by Ti:Sapphire lasers, we suggest using our silver-coated mirrors, which have minimal phase distortion.

Surface Quality

The surface quality of an optic is described by its surface figure and irregularity. Surface figure is defined as peak-to-valley deviation from flatness, including any curvature (also known as power) present. Surface irregularity is represented by the peak-to-valley deviations when power is subtracted. Our front-surface figure is guaranteed flat to less than l/10 at 633 nm over the clear aperture. Our 2" mirrors have a figure of l/4 over the clear aperture. When preservation of wavefront is critical, choose a flatness of l/10 or better.
As for surface quality, the smaller the scratch-dig specification, the lower the scatter. Our metal mirrors offer a scratch-dig of 25-10; our dielectric mirrors, 15-5; and our UV mirrors, 10-5, which is ideal for the most demanding laser systems where low scatter is critical.
dig: a defect on the surface of an optic as defined in average diameter in 1/100 of a millimeter.
scratch: a defect on an optic that is many times longer than it is wide.

Applications

  • Bio-Instrumentation
  • Microscopy
  • High-power Nd:YAG applications
  • Ultrashort-Pulse Application

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