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SUZHOU TAOMSUN SCIENTIFIC INSTRUMENTS CO.,LTD
Concave holographic grating
NegotiableUpdate on 08/26
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Overview
Concave holographic grating is an important dispersive element in spectroscopic instruments, which is made by holographic recording technology and has a variable pitch curve groove structure. It combines dispersion and imaging functions, and can form a spectroscopic instrument with only one optical surface. Compared to machine engraved gratings, it has more advantages in aberration correction, signal-to-noise ratio, and cost, and is widely used in various spectral analysis scenarios, providing strong support for accurate detection.
Product Details
TAOMSUN Spectral core components
🤝 Overseas technical partners:METICULAB™
TAOMSUN Concave Holographic Grating - Variable Pitch Aberration Correction High Signal to Noise Ratio Spectrometer Core Dispersion Element
Brand:TAOMSUN ｜Overseas technical support:METICULAB (Korea) |Holographic recording technology·Variable pitch curve groove aberration correction
TAOMSUN concave holographic gratingIt is a key dispersive element in spectroscopic instruments, which adopts advanced holographic recording technology and variable spacing curve groove structure design. It has both色散andimagingDual function, capable of separating and focusing with only one optical surface in the spectrometer, greatly simplifying the system structure. Compared with traditional machine engraved gratings, its unique aberration correction capability can significantly improve spectral resolution and signal-to-noise ratio, making it an ideal core component for spectral detection in fields such as environmental monitoring, material analysis, and biomedicine.
🔍 Core features:The variable spacing curve groove design comes with aberration correction to improve spectral purity; Holographic recording technology has low stray light and high signal-to-noise ratio; Concave substrates possess imaging capabilities and simplify optical systems.
📋 Technical Specifications
| manufacturing process | Holographic recording technology(Variable spacing curve groove) |
| base material | UV fused silica/optical glass/customized materials |
| Concave curvature radius | 50 – 1000 mmThe early bird catches the worm. |
| Marking density | 100 – 3600 lines/mm |
| Sparkling wavelength | 200 nm – 1200 nm(UV, visible, near-infrared optional) |
| spectral range | 190 nm – 1800 nm(Depending on coating and design) |
| Aberration correction | Variable spacing self correction(Ball aberration, coma, astigmatism) |
| Resolution | λ/dl > 10000(Typical value) |
| stray light | < 5×10⁻⁵(At the He Ne laser line) |
| coating | UV enhanced aluminum film, gold film, dielectric film (optional) |
| Effective aperture | > 90% |
| diffraction efficiency | Peak value>60%(Based on coating and shining conditions) |
📐 Standard Selection Table
| model | Size (mm) | Lines/mm | Reciprocal of linear dispersion (nm/mm) | Light wave band (nm) | Arm insertion (mm) | Arm out (mm) | Angle (°) |
|---|---|---|---|---|---|---|---|
| A1 | 32×32×9.5 | 1200 | 8 | 190-850 | 100 | 94 | 61.6 |
| A2 | 32×32×9.5 | 1200 | 8 | 250-900 | 100 | 94 | 61.6 |
| A3 | 40×45×10 | 1200 | 4 | 190-850 | 200 | 195 | 61.6 |
*If you need other specifications (such as different line densities, curvature radii, or bands), please contact us for customization.
📊 Performance advantages (compared to traditional machine engraved gratings)
| Aberration correction | Variable spacing curve groove, significantly better than equidistant machine engraved gratings, resulting in purer spectra |
| Signal to Noise Ratio (SNR) | Holographic recording technology with extremely low stray light and high signal-to-noise ratio |
| Imaging capability | The concave substrate comes with a focusing function, simplifying the optical path and reducing the number of components |
| service life | No mechanical scratches, stable diffraction structure, excellent repeatability |
| Cost effectiveness | Mass production using replication technology, cost-effective compared to ultra precision machine engraving |
⭐ Core advantages
✅Aberration self correction- Variable spacing design, no need for additional calibration components
✅Ultra high signal-to-noise ratioHolographic technology suppresses stray light to 5 × 10 ⁻⁵
✅Dispersion+imaging integrated- Concave substrate, simplifying the spectrometer optical path
✅Wide spectral coverage– 190-1800nm， UV to near-infrared
✅high resolution– λ/Δλ > 10000， Meet the requirements of precision analysis
✅High diffraction efficiencyPeak value>60%, low signal loss
✅long-term stabilityHolographic structure has no mechanical stress and constant performance
✅Flexible Customization- Line density, curvature radius, and coating can be customized as needed
🔬 Application areas
uv-visible spectrophotometer Raman spectroscopy system Fluorescence spectrometer Environmental monitoring instruments Material composition analysis Biomedical testing semiconductor inspection Astronomical spectroscopy
📦 customized service
Support full parameter customization to meet the design requirements of different spectral instruments:
- Base customization:Fused silica, optical glass, or customer specified materials
- 凹面曲率：Any design within the range of 50-1000mm
- Engraving density:100-3600 lines/mm， Covering from ultraviolet to near-infrared
- Customized coating:UV enhanced aluminum, gold, dielectric enhancement film, etc
- Small batch trial production:3-5 pieces are sufficient to initiate trial order verification
❓ Frequently Asked Questions (FAQ)
Q: What is the main difference between concave holographic gratings and planar holographic gratings?
A: Concave holographic gratings are made on concave substrates with built-in focusing ability, allowing for imaging without the need for additional mirrors and a more compact optical path. And the planar grating needs to be used in conjunction with a focusing mirror, resulting in a larger system volume.
Q: What are the advantages of variable spacing gratings compared to equidistant gratings?
A: Variable spacing design can actively correct aberrations (especially spherical aberration and coma), significantly improving spectral resolution and imaging quality, which cannot be achieved by conventional equidistant gratings.
Q: How to choose the appropriate line density for my spectrometer?
A: The line density determines the spectral resolution and bandwidth. High engraved lines (>1800 lines/mm) are suitable for high-resolution UV visible applications, while low engraved lines (<600 lines="">
Q: Is holographic grating easily damaged?
A: The groove type of holographic grating is formed by photolithography and coating on photosensitive materials, with a sturdy structure. As long as physical scratches and strong acidic and alkaline environments are avoided, its lifespan far exceeds that of machine engraved gratings, and its performance is stable for a long time.
Q: Can you provide a complete OEM spectrometer grating module?
A: Okay. TAOMSUN provides a complete solution from grating design to coating, and can collaborate with METICULAB for joint optimization of optical systems.
🏭 About TAOMSUN
TAOMSUNWe are a professional supplier specializing in the field of precision optical components and spectral core components, focusing on the research and supply of optical components such as holographic gratings, lenses, and window plates. The company has obtained ISO 9001 quality management system certification and its products are widely used in high-end fields such as spectral analysis, environmental monitoring, and biomedicine. The core team has decades of experience in precision optical processing, relying on a mature supply chain system and strict quality control to ensure excellent quality and stable delivery of every product.🌏 Overseas technical support is provided by METICULAB from South Korea.
TAOMSUN
Precision optical components
📧 Sales Consultation
taomsun@vip.163.com
+86-13862625813
🌏 Overseas technical partners
METICULAB™
choikyc@gmail.com Icult-inventor responsible; + 82 - 10 - 3988 - 4813
WhatsApp / KakaoTalk
TAOMSUN products are manufactured under the ISO 9001 quality management system. The specification parameters are typical values, and customized configurations may vary.
If you need OEM/ODM customization, non-standard sizes, or special coatings, please contact our sales team. Overseas customers can contact METICULAB (Korea) for Korean/English technical consultation.
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