PLX Hollow Roof Mirrors

A Hollow Roof Mirror (HRM) is a two-mirror optical assembly arranged at a 90-degree angle, but with no solid glass in the corner. It reflects incoming light back at an angle orthogonal to the incoming beam, typically with very high precision.

The mirrors can be coated for optimization over a spectral range from UV to far IR. This configuration eliminates material absorption and chromatic aberration.

The HRM can be used in almost every application where a roof or porro prism can be used. Because the optical path is in air, there is no refraction nor any reflecting front prism surface. It is also insensitive to tilt or misalignment in one coordinate. If the HRM is rotated about the roofline, the reflected beam direction does not change. The HRM is provided in a versatile housing, which is compatible with all major mounting systems.

PLX is a Luxium Solutions brand that has been at the forefront of developing high-quality monolithic optics for over 60 years. PLX optics can withstand and perform under the harshest environmental conditions and maintain their accuracy over time.

Key Features

For any application where a roof top or Porro prism can be used.
The optical path is in the air so there is no refraction or reflecting front prism surface.
Useful in all wavelengths and available in a variety of accuracies and coatings.
Light weight aluminum housing for protection and ease of handling.
Compatible with all major mounting systems.
Custom “Knife Edge” design option available upon request, enhances beam quality, eliminates the cause of obscuration.
RoHS Compliant.
PLX is a registered ISO 9001 company.

Models

Model	Clear Aperture Width (in/mm)	Clear Aperture Length (in/mm)	Accuracy (arc.sec.)	Mirror Surface Flatness(p.v.633nm)	Weight (grams)
RM-051	0.5/13	1.0/25	0.25 – 15.0	λ/10 – λ/4	70
RM-1005	1.0/25	0.5/13	0.25 – 15.0	λ/10 – λ/4	35
RM-101	1.0/25	1.0/25	0.25 – 15.0	λ/10 – λ/4	90
RM-102	1.0/25	2.0/51	0.25 – 15.0	λ/10 – λ/4	165
RM-104	1.0/25	4.0/102	0.25 – 15.0	λ/6 – λ/4	250
RM-201	2.0/51	1.0/25	0.25 – 15.0	λ/10 – λ/4	175
RM-202	2.0/51	2.0/51	0.25 – 15.0	λ/10 – λ/4	285
RM-204	2.0/51	4.0/102	0.25 – 15.0	λ/6 – λ/4	475
RM-303	3.0/76	3.0/76	0.25 – 15.0	λ/8 – λ/4	825