Roland Concave Holographic Grating

The concave grating of the Roland type is a holographic replica of the classic ruled concave grating originally invented by Henry Rowland in the 19th century. In a Roland grating, the grooves are straight and uniformly spaced along chords of the concave surface. These gratings are ideally suited for mounting configurations based on the Roland circle—a circle whose diameter equals the radius of curvature of the grating surface.

The Roland concave holographic grating embodies the foundational optical principles of Rowland’s original concave grating design, realized through advanced holographic fabrication techniques. Its groove pattern is precisely engineered to be equidistant along chords of the concave substrate, delivering exceptional performance in Roland-circle optical systems. Combining the elegance and inherent aberration correction of the classical design with the precision and consistency of modern holography, it stands out as an optimal solution for broadband, high-resolution spectroscopic applications.

Groove Density 600 – 2400 lines/mm
Blaze Wavelength Range 250 – 500 nm
Standard Reflective Coating Aluminum
Grating Type Reflective concave holographic grating (Roland-circle configuration)
Substrate Material Optical glass K9
Thickness Tolerance ±0.1 mm
Radius of Curvature Customizable to meet system requirements
Typical Application Configuration Roland-circle optical layout
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