Parabolic Mirror, Off-Axis Replicated, 1.5 in., 4.0 in. EFL, Aluminum
The 50338AL Off-Axis Replicated Parabolic Mirror is 1.50 inches in diameter, with an effective focal length of 4.00 inches, and coated with Protected Aluminum. These standard off-axis parabolic mirrors are circular segments from one side of a full paraboloid. The focal point is displaced from the mechanical axis, giving full access to the reflector focus area. There will be no shadowing when placing either a detector or source at the focus.
Off-axis Design for Detector Applications
Compared with on-axis parabolic or ellipsoidal reflectors, the off axis mirrors do not have a central hole enabling light across the entire aperture of the mirror to be focused onto a detector. Moreover, by folding the optical axis and displacing the focus away from the mechanical axis, it is easier to install baffles to block stray light from paths outside the aperture from reaching the detector.
High Collection Efficiency
Off axis parabolic mirrors offer similar high numerical aperture to aspheric lenses without suffering from chromatic aberration when used over extremely wide wavelength ranges. The mirrors are ideal for collecting and concentrating light onto high speed detectors, or for collimating light output from broadband incoherent sources such as LEDs or super luminescent diodes.
Gold or Aluminum Reflective Coatings
Two metallic reflective coating options are available. Aluminum for UV and visible applications and bare Gold for infrared applications. The models listed are catalog versions of common OEM mirror designs.
Integral Mounting Base
Our off-axis replicated parabolic mirrors feature an integral mounting base with the mounting hole pattern shown.
Versatile Mounting
UPA2-OAP is a versatile adaptor used to provide a mounting interface for Replicated Off-Axis Parabolic Mirrors. It allows mounting in three ways: vertical post mounting, horizontal post mounting, and can be mounted into any positioner that can hold a 2 in. diameter optic, such as mirror mounts, lens mounts, and rotation mounts.
Specifications
Coating Code
AL
Coating Adhesion
MIL-F-48616
Coating Hardness
MIL-F-48616 modified to 0.5lb
Humidity Resistance
MIL-F-48616
Surface Quality
60-40 scratch-dig
Surface Roughness, Typical
25 Å
Wavefront Distortion
≤0.5λ RMS
Clear Aperture
≥90% of diameter
Operating Temperature Range
-60 to 70 °C
Coating Code
AL
Coating Adhesion
MIL-F-48616
Coating Hardness
MIL-F-48616 modified to 0.5lb
Humidity Resistance
MIL-F-48616
Surface Quality
60-40 scratch-dig
Surface Roughness, Typical
25 Å
Wavefront Distortion
≤0.5λ RMS
Clear Aperture
≥90% of diameter
Operating Temperature Range
-60 to 70 °C
