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China Broadband Infrared Grating Manufacturer

This dispersive element is optimized for the infrared spectral region above 2.5 μm, using specialized substrate materials and coating processes.

Key Advantages

• High-reflectivity metal film: Gold and aluminum coatings optimized for the infrared range

• Specialized substrates: Infrared-transmitting materials such as KRS-5 and ZnSe

• Low line density design: Ensures high diffraction efficiency in the long-wavelength range

Typical Applications

FTIR spectrometers, QCL tuning, environmental monitoring, and infrared countermeasure systems

Number	Line density (l/mm)	Blaze wavelength (nm)	Blaze wavelength 1 (nm)	Blaze wavelength2(μm)	Scribing area (H×W, mm²)
JY2-001	50	2500-2500	4200	20600	25×25&50×50
JY2-002	100	2500-20000	4200	19000	25×25&50×50
JY2-003	90.9	4000-21000	6000	21000	25×25&50×50
JY2-004	90.9	4000-21000	7000	21000	25×25&50×50
Other specifications can be customized.

Broadband Infrared Grating 50l/mm 2500nm
As a leading manufacturer rather than a mere distributor, JYTEC controls every step of the production process—from substrate selection to final ruling—ensuring unmatched quality, consistency, and

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Broadband Infrared Grating 100l/mm 2500nm-20000nm
In a market where most components are optimized for narrow bands, this grating stands out as a dual-blaze broadband solution, seamlessly bridging the Mid-Infrared (MIR) and Far-Infrared (FIR)

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Broadband Infrared Grating 100l/mm 2500nm-20000nm

Technical Selection and Procurement Guide for Optical Systems

Broadband Infrared Gratings are reflective diffraction gratings developed for optical systems operating across broad infrared wavelength ranges. They separate incident infrared radiation into different diffraction angles according to wavelength and are used where controlled spectral dispersion is required.
The grating specification must be matched to the optical system rather than selected by wavelength range alone. Groove density, blaze wavelength, blaze angle, diffraction order, substrate, coating, active area, and diffraction efficiency all affect the final optical performance.
For broadband and mid- to long-wave infrared applications, lower groove densities are often used to obtain practical diffraction angles over longer wavelengths. The appropriate configuration depends on the target spectral range, optical geometry, and required spectral resolution.

Product Classification

Specification Field	Technical Description
Item	Infrared Diffraction Grating
Optical Function	Spectral dispersion
Configuration	Reflective grating
Spectral Region	Broadband infrared (NIR, MWIR, LWIR)
Typical Structure	Ruled or blazed groove structure, subject to specification
Key Parameters	Groove density, blaze wavelength, blaze angle, coating, substrate, size, diffraction order
Typical Systems	Spectrometers, FTIR systems, monochromators, spectrographs, and infrared optical instruments

Key Factors When Selecting a Broadband IR Grating

Selecting a broadband infrared grating requires evaluating core optical design requirements rather than relying on product names alone.

Operating Wavelength Range
Define your exact working spectrum—including minimum, maximum, and central design wavelengths, required bandwidth, and expected diffraction order. Note: Achieving a wavelength does not guarantee peak efficiency across the entire range.

Groove Density (grooves/mm)
Lower density: Provides larger groove spacing, ideal for practical long-wave infrared (LWIR) diffraction geometries.
Higher density: Delivers greater dispersion and resolution, but may create impractically wide diffraction angles.

Blaze Wavelength and Angle

The blaze configuration concentrates energy into a specific diffraction order. In Littrow or near-Littrow setups, an improper match will severely degrade diffraction efficiency even if the nominal wavelength fits.

Infrared Coating

Reflective coatings (such as gold or aluminum) must match your target wavelength band, polarization state, angle of incidence, and environmental durability requirements.

Substrate Material

The substrate determines thermal stability, mechanical strength, and surface figure. It must remain stable under thermal fluctuations and be compatible with your mounting architecture.

Broadband Infrared Grating Specifications

Specification Item	Buyer Requirement / Target Parameter
Wavelength Range	Specify required operating range
Groove Density	Specify grooves/mm
Blaze Wavelength	Specify design wavelength
Blaze Angle	Specify according to optical design
Diffraction Order	Specify required order
Substrate & Size	Specify material, dimensions, and clear aperture
Coating Type & Range	Specify IR coating and match to operating band
Surface Quality & Flatness	Specify required grade and optical flatness
Diffraction Efficiency	Specify wavelength, test conditions, and polarization
Mounting Configuration	Bare optic or mounted configuration

Typical Applications

FTIR and Infrared Spectrometers: Dispersive elements that spatially separate wavelengths. Specifications must be coordinated with the detector range, optical path, and slit geometry.

Infrared Monochromators: Determines how efficiently the selected wavelength is separated from neighboring wavelengths.

Mid-Infrared Spectrographs: Requires parameters suitable for longer wavelengths (e.g., ruled gratings used for spectral separation in the 3 to 6 micrometer region).

Infrared Laser Systems: Used for wavelength selection or dispersion, requiring precise blaze wavelength and coating matching.

Environmental and Gas Analysis: Used in instrument architectures requiring spatial spectral dispersion to identify molecular absorption features.

Broadband Infrared Grating 50l/mm 2500nm

FAQ

Q: How do I choose between a ruled grating and a replicated grating for infrared applications?

A: Ruled Gratings are manufactured directly using a precision ruling engine, offering excellent wavefront performance and high damage thresholds, making them ideal for high-power infrared laser systems and demanding research applications.
Replicated Gratings are produced by transferring a master groove pattern onto a substrate, offering a cost-effective solution for OEM instruments, FTIR spectrometers, and commercial gas-analysis systems without sacrificing optical performance.

Q: Why is groove density specified differently for broadband IR compared to visible light gratings?

A: Infrared wavelengths are significantly longer than visible light. High groove densities can cause light to diffract at impractically wide angles or fall outside the operational limits of the detector. Therefore, lower groove densities (fewer grooves/mm) are typically used in broadband infrared applications to maintain manageable diffraction geometries and high efficiency across a wide spectral band.

Q: Can a visible or near-infrared (NIR) grating be used for mid-infrared (MIR) or long-wave infrared (LWIR) applications?

A: No. Gratings are optimized for specific wavelength regions based on their blaze angle, groove profile, and reflective coating. A coating optimized for visible light (like aluminum or protected silver) will experience significant absorption and reduced reflectance in the mid-to-long-wave infrared range, leading to severe efficiency losses.

Q: What information is critical when requesting a custom diffraction efficiency curve from a supplier?

A: A raw percentage number is insufficient. To evaluate diffraction efficiency accurately, your request or specification sheet must include:
The specific test wavelength(s)
The expected diffraction order
The polarization state (S, P, or unpolarized)
The measurement geometry (e.g., Littrow configuration or specific angle of incidence)

Q: How does substrate material selection impact broadband infrared grating performance?

A: The substrate does more than just hold the optical coating; it determines the thermal and mechanical stability of the grating. For broadband infrared systems, the substrate must maintain its surface figure under thermal fluctuations and be mechanically compatible with the instrument's mounting architecture to prevent wavefront distortion.

As one of the leading broadband infrared grating manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please feel free to wholesale customized broadband infrared grating from our factory. Welcome to view our website for more information.

Ruled IR Grating, CO Laser Grating, Broadband Infrared Grating 100l mm 2500nm 20000nm