Broadband Hollow Retroreflectors
Broadband Hollow Retroreflectors
Our broadband hollow retroreflectors are constructed of three front-surface mirrors assembled into a cornercube. The patented fabrication technique enables as fine as 1 arc second return beam parallelism with ≤λ/3 wavefront distortion at an affordable price.
- Stress-free mounting for thermal stability
- As low as 1 arc sec return beam accuracy
- UV, visible, VIS-IR or IR coatings
- Total wavefront distortion ≤λ/3
- 25.4 and 63.5 mm aperture sizes See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | UBBR1-1 Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 1 arc sec, 400-700 nm | |||||
| UBBR1-1I Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 1 arc sec, 650-16,000 nm | |||||
| UBBR1-1S Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 1 arc sec, 450-10,000 nm | |||||
| UBBR1-1UV Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 1 arc sec, 225-700 nm | |||||
| UBBR1-2 Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 2 arc sec, 400-700 nm | |||||
| UBBR1-2I Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 2 arc sec, 650-16,000 nm | |||||
| UBBR1-2S Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 2 arc sec, 450-10,000 nm | |||||
| UBBR1-2UV Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 2 arc sec, 225-700 nm | |||||
| UBBR1-5 Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 5 arc sec, 400-700 nm | |||||
| UBBR1-5I Broadband Hollow RetroreflectorsHollow Retroreflector, Broadband, 1.0 in, 5 arc sec, 650-16,000 nm |
Features
Alignment-Free 180 Degree Reflection
Retroreflectors, also known as corner cubes as all three mirror surfaces are perpendicular, will reflect all incoming light 180° regardless of incidence angle, resulting in a reflected beam that is precisely parallel to the incident beam. This is achieved without requiring prior alignment (as with a flat mirror). Images reflected by a corner cube are reversed and inverted.
Retroreflector Stability
Our broadband hollow retroreflectors are constructed of three front-surface flat mirrors assembled into a corner cube. A stress-free mounting technique is employed to ensure dimensional stability.
Comparison with Solid Glass Retroreflectors
Hollow retroreflectors offer advantages of more accurate parallelism, ability to accommodate larger beam diameters, and better preservation of polarization compared to solid glass retroreflectors. Our UBBR1-1 hollow retroreflectors provide as low as 1 arc sec return beam accuracy, compared to 2 arc sec provided by our BGR solid glass retroreflectors. The UBBR2.5 hollow retroreflectors' 2.5-in. (63.5-mm) aperture is larger than typical solid glass retroreflectors' diameters. Polarized light traveling through solid glass can result in unpredictable polarization, whereas reflected light from a metallic coating traveling through air in a hollow retroreflector tends to have its polarization preserved better. Finally, for psec and fsec ultrashort pulses, hollow retroreflectors introduce much lower dispersive effects compared to solid glass.
Ideal for Optical Delay Lines
One of the most critical factors in achieving reliable delays in an optical delay line is parallelism between (1) the beam traveling to the retroreflecting optics and (2) the beam on its return path. UBBR Series hollow retroreflectors provide 1, 2, and 5 arc second return beam parallelism with no adjustment necessary. UBBR2.5-5 Series hollow retroreflectors, with 2.5 in. (63.5 mm) aperture and 5 arc second parallelism, are key elements in Newport's Optical Delay Line Component Kits that enable faster and easier construction of single, dual, or quadruple pass set ups. These delay line kits are a useful tool for many ultrashort pulse applications.
