Pulsed lasers, on the other hand, often strip electrons from the lattice structure of an optic before causing thermal damage. Continuous wave (CW) lasers typically cause damage from thermal effects (absorption either in the coating or in the substrate). The LIDT for an optic greatly depends on the type of laser you are using. When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. The following is a general overview of how laser induced damage thresholds are measured and how the values may be utilized in determining the appropriateness of an optic for a given application. This type of adapter allows rotation of the OAP mirror with respect to the adapter prior to securing its position, whereas when using the SM-threaded adapters offered on this page, the final location of the OAP mirror is dictated either by the threads themselves (when fully threaded into a mount) or by using the provided retaining ring to secure it in place.įor Ø3" OAP mirrors, we offer the SM2MP3 mounting adapter, which contains four 8-32 tapped holes for post mounting and has external SM2 threading for mounting in our SM2-threaded components, such as the K6X2 6-axis kinematic mount.Īlternatively, all of our OAP mirrors may be directly mounted in our Precision Kinematic Mirror Mounts using their outer diameter. Our Ø1/2", Ø1", and Ø2" OAP mirrors can also be adapted to our SM threads by placing them into our SM Thread to Double Bore Adapters. The table below shows all of these options. For Ø1" 90° OAP mirrors, the KCB1P(/M) right-angle mount allows for cage system integration. The third type is externally SM threaded for direct compatibility with any of our internally SM-threaded components, such as our rotation mounts. The second type, designed for post mounting, contains an 8-32 (M4) tapped hole on all four sides for direct mechanical compatibility with Ø1/2" Posts. The first type is designed to be mounted in any Ø1", Ø2", or Ø3" mirror mount, depending upon the diameter of the OAP mirror. We offer three types of mounting plates for Ø1/2", Ø1", and Ø2" OAP mirrors. The tapped holes are also useful in OEM applications. Together, these features allow our OAP mirrors to be securely mounted. These holes are used to attach our Mounting Adapters, which contain three corresponding counterbore holes or captive screws and an alignment pin (see the image to the right). The bottom of each off-axis parabolic (OAP) mirror contains three tapped mounting holes in a triangle pattern and an alignment hole. Any other cleaning method may damage the surface. No attempt should be made to clean the surface other than blowing off dust with clean, dry air or nitrogen. Latex gloves or a similar protective covering should be worn to prevent oil from fingers from reaching the surface. Unprotected gold mirrors should only be handled when necessary and always held by the sides. Bare gold does not oxidize in air, but can be easily damaged by fingerprints, aerosols, or the slightest contact with any abrasive material. The gold layer on unprotected mirrors does not include a protective overcoat. The interiors of both types of through holes are not anodized. The non-optical surfaces are black-anodized and laser-engraved with the item number for easy identification as shown in the image to the right. Holes parallel to the collimated beam pass through the base of the OAP mirror, so mounting adapters cannot be used with these parts. For OAP mirrors with holes parallel to the focused beam, the holes in the base can be used with a mounting adapter (see the OAP Mounting tab for more details). The base of each mirror has three tapped mounting holes in a triangle pattern and an alignment hole. The OAP mirrors are fabricated using aluminum substrates. Additionally, these mirrors can be used in applications where the polarization state needs to be strictly maintained or to prevent dispersion due to the overcoat of protected gold mirrors. Unprotected gold offers higher reflectance than protected gold but is more delicate. Surface Roughness: 97% average reflectance from 800 nm - 20 µm (see the Graphs tab for a plot of the coating performance).Unprotected Gold Coating Provides >97% Average Reflectance from 800 nm to 20 µm.Reflected Beam is Focused without Spherical or Chromatic Aberrations.Parallel to Collimated Beam: Ø3.2 mm Hole from the Mirror Surface to the Flat Base.Parallel to Focused Beam: Ø8 mm Entrance Hole in Back Tapers Down to Ø3 mm Hole in Mirror Surface.
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