LBTEK hollow retroreflectors are coated with a protected silver film, offering high reflectivity in the visible to infrared range (Ravg > 96%@450 nm-2 μm, Ravg > 97.5%@2 μm-20 μm), making them suitable for optical retroreflection and interferometry in the visible to infrared spectrum. This series provides three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to meet various beam diameters and system space requirements. Among them, the half-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, allowing direct compatibility with same-specification internally threaded optical mounts.

LBTEK hollow retroreflectors are coated with a protected gold film on the surface, offering high reflectivity in the infrared band (Ravg > 96%@800 nm–20 μm), making them suitable for infrared optical path retroreflection and interferometry. This series provides three standard sizes: half-inch, 1 inch, and 2 inches, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, meeting the assembly requirements of different beam diameters and system spaces. Among them, the half-inch and 1-inch versions are paired with an SM05 threaded mount, while the 2-inch version is paired with an SM1 threaded mount, allowing direct adaptation to optical mounts with the same internal thread specifications.

LBTEK hollow retroreflectors are coated with a protective UV-enhanced aluminum film, offering high reflectivity in the ultraviolet band (Ravg＞90%@250 nm-450 nm), making them suitable for UV optical path retroreflection and interferometry. This series provides three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to meet various beam diameter and system space assembly requirements. Among these, the half-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, allowing direct compatibility with same-specification internally threaded optical mounts.