Reflective Holographic Gratings manufacturer
The key characteristics and advantages of holographic gratings include a spectrum free of ghost lines, high wavefront quality, tunable groove profiles, and extremely high groove densities. The fabrication process involves several critical steps—such as substrate preparation, photoresist coating, exposure, development, ion-beam etching, and thin-film coating—where even minor errors can compromise grating quality or lead to total failure. The process begins by coating the prepared substrate with a layer of photoresist of a specific thickness, followed by exposure within an interference system to record the interference fringes. After developing the exposed substrate to form a photoresist grating, ion-beam etching is performed; finally, cleaning and vacuum coating yield the finished reflective holographic grating.
|
Number |
Line Density (l/mm) |
Spectral Range(nm) |
Peak Wavelength(nm) |
Incised Area(H×W,mm²) |
|
JY4-001 |
1200 |
190-800 |
220 |
25×25&50×50 |
|
JY4-002 |
1800 |
190-1000 |
250 |
25×25&50×50 |
|
JY4-003 |
2400 |
190-800 |
250 |
25×25 |
|
JY4-004 |
3600 |
170-500 |
190 |
25×25&50×50 |
|
JY4-005 |
4321 |
160-450 |
170 |
25×25&50×50 |
|
Other specifications will be added successively. |
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Planar holographic gratings are advanced dispersive elements fabricated using laser interference lithography. By recording the interference fringes generated by two coherent laser beams, a perfect sinusoidal groove profile is formed in a photosensitive material and subsequently transferred to the substrate via ion-beam etching. Compared to mechanically ruled gratings, holographic gratings offer significant advantages in terms of stray light suppression, wavefront flatness, and noise performance. Interference fringes are produced when two coherent light beams intersect; these are recorded in a photosensitive material to form the grating grooves, with the fringe spacing determined by the angle between the beams and the wavelength. Because the groove positions are defined by interference conditions, gratings produced in this manner are free from the random and periodic errors associated with mechanical ruling.
The groove densities of the planar holographic grating masters range from 1,200 lines/mm to 4,321 lines/mm, covering a spectral range of 170–1,800 nm. New holographic grating masters can also be fabricated to meet specific user requirements.
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Reflective Holographic Gratings 1200l/mm 220nmThe Reflective Holographic Gratings 1200l/mm 220nm is designed for one job: providing reliable, high-efficiency performance from deep UV to visible, with the low stray light and wavefront quality -
![Reflective Holographic Gratings 1800l/mm 250nm]()
Reflective Holographic Gratings 1800l/mm 250nmAs a specialized manufacturer of holographic grating solutions, we combine decades of precision optical expertise with state-of-the-art fabrication facilities. Whether you need a custom holographic -
![Reflective Holographic Gratings 2400l/mm 250nm]()
Reflective Holographic Gratings 2400l/mm 250nmThis holographic reflection grating delivers aberration-free imaging, ultra-low stray light, and high efficiency across the UV-visible range, making it the ideal choice for the most demanding -
![Reflective Holographic Gratings 3600l/mm 190nm]()
Reflective Holographic Gratings 3600l/mm 190nmAs a specialized manufacturer of holographic grating solutions, we combine decades of precision optical expertise with state-of-the-art fabrication facilities. Whether you need a custom holographic
Reflective Holographic Gratings are diffraction gratings that use a holographically generated periodic surface structure to disperse incident light by wavelength while operating in reflection.
They are widely used in instrument designs where precise control over wavelength separation, spectral resolution, stray-light behavior, and optical efficiency is required.
Typical applications include spectrometers, monochromators, spectrographs, optical analyzers, laboratory instruments, and OEM spectroscopy systems.
Key Parameters at a Glance
|
Item |
Specification and Selection Consideration |
|
Product Type |
Reflective Holographic Diffraction Grating |
|
Grating Structure |
Holographically generated periodic groove structure |
|
Operating Principle |
Wavelength-dependent diffraction in reflection |
|
Main Selection Factors |
Wavelength, groove density, diffraction order, geometry, efficiency, coating, aperture, substrate, dimensions |
|
Typical Systems |
Spectrometers, monochromators, spectrographs, optical analyzers |
|
Supply Mode |
Standard configurations or application-specific configurations based on technical requirements |
|
Customization Support |
Optical and mechanical requirements can be evaluated for project-specific configurations |
Reflective holographic gratings separate light into spectral components through diffraction from a periodic surface structure. Unlike transmission gratings, light is diffracted from a reflective surface rather than transmitted through the grating substrate.
The holographic manufacturing process records an interference pattern onto the grating surface and develops a periodic groove structure. This approach produces highly regular groove patterns, making it particularly suitable for applications requiring strict control over stray light and guaranteed spectral performance.
Comparison of Grating Manufacturing Technologies
Different manufacturing technologies directly affect the behavior of the final optical component:
Reflective Holographic Gratings: Holographically generated grooves provide high regularity and are exceptional in systems where stray light and spectral purity are critical design considerations.
Plane Ruled Gratings: Utilize mechanically generated grooves. They offer strong diffraction efficiency in selected wavelength regions and are widely used across various spectroscopic systems.
Transmission Gratings: Disperse light as it passes through the grating, ideal for optical layouts requiring transmissive rather than reflective diffraction elements.
Concave Holographic Gratings: Combine diffraction and optical focusing characteristics on a curved substrate, suitable for optical systems where the grating itself participates in spectral imaging.
How to Select a Reflective Holographic Grating?
Determine the Wavelength Range: First, identify the wavelength or wavelength range the instrument must measure or select. The operating wavelength determines the grating configuration and reflective coating.
Determine the Required Groove Density: Groove density determines the angular dispersion produced by the grating. Higher groove density generally provides greater angular dispersion, but the exact value must be evaluated based on the complete optical design.
Define the Diffraction Order: The diffraction order determines how selected wavelengths are distributed. First-order operation is common in many spectroscopy systems, while other configurations depend on instrument design.
Check the Optical Geometry: Gratings cannot be selected independently of the optical path. Important geometrical information includes the angle of incidence, diffraction angle, Littrow or non-Littrow configuration, included angle, and beam size.
Evaluate Diffraction Efficiency: Efficiency depends on wavelength, groove structure, groove density, diffraction order, incidence geometry, polarization state, and reflective coating.
Consider Polarization: If the optical system utilizes polarized light, polarization-dependent efficiency must be included in the specification review.
Match the Reflective Coating: The reflective coating determines the usable spectral region and impacts overall optical efficiency; it should be selected according to the intended wavelength range.
Check Aperture and Mechanical Dimensions: The optical surface must accommodate the incident beam without excessive clipping or unsuitable beam footprints.
Manufacturing and Quality Control
Producing a grating involves much more than a substrate with a periodic surface. The production process includes:
Optical Substrate Preparation -> Surface Preparation -> Holographic Exposure -> Groove Structure Development -> Surface Treatment & Coating -> Dimensional Inspection -> Optical Performance Testing -> Cleaning & Packaging.
For OEM procurement, quality control and traceability records (such as dimensional inspection, surface quality, flatness measurement, groove density verification, efficiency testing, and batch traceability) are core to ensuring batch consistency.
As one of the leading reflective holographic gratings manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please feel free to wholesale customized reflective holographic gratings from our factory. Welcome to view our website for more information.
gold coated grating, 1200 lines mm grating, Reflective Holographic Gratings 1800l mm 250nm
