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E-mail
taomsun@vip.163.com
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13862625813
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Address
Building A, Renheng PARK, 1211 Xinghu Street, Suzhou Industrial Park
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SUZHOU TAOMSUN SCIENTIFIC INSTRUMENTS CO.,LTD
Concave Holographic Grating
NegotiableUpdate on 08/26
- Model
- A1/A2/A3
- Nature of the Manufacturer
- Producers
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- Place of Origin
Overview
The concave holographic grating is a key dispersive element in spectroscopic instruments, manufactured by holographic recording technology with a variable-spacing curved-groove structure. It combines both dispersion and imaging functions, allowing a spectrometer to be built with just one optical active surface. Compared with ruled gratings, it offers advantages in aberration correction, signal-to-noise ratio and cost, and is widely used in a variety of spectral analysis applications, providing strong support for accurate detection.
Product Details
TAOMSUNSpectroscopy Core Components
🌏 Made in China · Korea Sales / Technical Support · OEM / ODM Available
TAOMSUN Concave Holographic Grating – Variable-Pitch Aberration-Corrected | High SNR Core Dispersive Element for Spectrometers
Brand: TAOMSUN ｜ Origin: China ｜ Korea Sales / Technical Support: METICULAB (Korea) ｜ Holographic recording · Variable-pitch curved grooves · Aberration correction
The TAOMSUN concave holographic grating is a key dispersive element for spectrometers, manufactured using advanced holographic recording technology with a variable-pitch curved-groove structure. It combines both dispersion and imaging functions, enabling a spectrometer to achieve spectral separation and focusing with just a single optical surface – greatly simplifying the system design. Compared with conventional ruled gratings, its unique aberration-correction capability significantly improves spectral resolution and signal-to-noise ratio, making it the ideal core component for spectral detection in environmental monitoring, materials analysis, biomedicine and other fields.
🔍 Key features: variable-pitch curved-groove design – built-in aberration correction improves spectral purity; holographic recording process – ultra-low stray light, high SNR; concave substrate – combines imaging capability and simplifies the optical system.
📷 Product Gallery
Product overview
Grating detail
Groove structure
Coating options
Spectrometer integration
📋 Technical Specifications
| Manufacturing process | Holographic recording (variable-pitch curved grooves) |
| Substrate material | UV-grade fused silica / optical glass / custom materials |
| Concave radius of curvature | 50 – 1000 mm (customizable) |
| Groove density | 100 – 3600 lines/mm |
| Blaze wavelength | 200 nm – 1200 nm (UV, visible or NIR optional) |
| Spectral range | 190 nm – 1800 nm (depending on coating and design) |
| Aberration correction | Variable-pitch self-correction (spherical aberration, coma, astigmatism) |
| Resolution | λ/Δλ > 10000 (typical) |
| Stray light | < 5×10⁻⁵ (at He-Ne laser line) |
| Coating | UV-enhanced aluminum, gold or dielectric (optional) |
| Clear aperture | > 90% |
| Diffraction efficiency | Peak > 60% (depending on coating and blaze conditions) |
| Origin | China |
| Korea Sales / Technical Support | METICULAB (Korea) |
📐 Standard Models
| Model | Size (mm) | Grooves (lines/mm) | Linear dispersion (nm/mm) | Band (nm) | Entrance arm (mm) | Exit arm (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 |
* For other specifications (e.g. different groove density, radius of curvature or spectral band), please contact us for customization.
📊 Performance Advantages (vs. Conventional Ruled Gratings)
| Aberration correction | Variable-pitch curved grooves, significantly better than equal-pitch ruled gratings, purer spectrum |
| Signal-to-noise ratio (SNR) | Holographic recording process, extremely low stray light, high SNR |
| Imaging capability | Concave substrate provides built-in focusing, simplifies the optical path and reduces components |
| Service life | No mechanical scratching, stable diffractive structure, excellent repeatability |
| Cost effectiveness | Replication process enables volume production, better value than ultra-precision ruled gratings |
⭐ Key Advantages
✅ Aberration self-correction – variable-pitch design, no extra correcting elements
✅ Ultra-high SNR – holographic process, stray light suppressed to 5×10⁻⁵
✅ Dispersion + imaging in one – concave substrate simplifies the spectrometer optical path
✅ Broad spectral coverage – 190-1800nm, UV to near infrared
✅ High resolution – λ/Δλ > 10000 for precision analysis
✅ High diffraction efficiency – peak > 60%, minimal signal loss
✅ Long-term stability – holographic structure without mechanical stress, consistent performance
✅ Flexible customization – groove density, radius of curvature and coating per requirements
🔬 Applications
UV-VIS spectrometersRaman spectroscopy systemsFluorescence spectrometersEnvironmental monitoring instrumentsMaterial composition analysisBiomedical testingSemiconductor inspectionAstronomical spectroscopy
📦 Customization Service
Full-parameter customization is supported to meet the design requirements of different spectrometers:
- Substrate customization: fused silica, optical glass or customer-specified material
- Concave curvature: any design within 50-1000mm
- Groove density: 100-3600 lines/mm, covering UV to near infrared
- Coating customization: UV-enhanced aluminum, gold, dielectric mirror coatings, etc.
- Small batch trials: 3-5 pcs to start validation
❓ Frequently Asked Questions (FAQ)
Q: What is the main difference between a concave holographic grating and a plane holographic grating?
A: A concave holographic grating is made on a concave substrate and has built-in focusing capability – it can image without an extra mirror, making the optical path more compact. A plane grating requires a focusing mirror, so the system is larger.
Q: What advantages does a variable-pitch grating offer over an equal-pitch grating?
A: The variable-pitch design actively corrects aberrations (especially spherical aberration and coma), significantly improving spectral resolution and image quality – something a conventional equal-pitch grating cannot achieve.
Q: How do I choose the right groove density for my spectrometer?
A: Groove density determines spectral resolution and bandwidth. High-density grooves (>1800 lines/mm) suit high-resolution UV-VIS applications; low-density grooves (<600 lines/mm) suit wide-bandwidth applications.
Q: Are holographic gratings easy to damage?
A: No. The grooves of a holographic grating are photochemically recorded on a photosensitive layer and then coated, forming a robust structure. As long as physical scratching and strong acid/alkali environments are avoided, its service life far exceeds that of ruled gratings, with long-term stable performance.
Q: Can you provide complete OEM spectrometer grating modules?
A: Yes. TAOMSUN provides complete solutions from grating design to coating, and can work with METICULAB for joint optimization of the optical system.
🏭 About TAOMSUN
TAOMSUN is a professional supplier deeply engaged in precision optical components and core spectroscopy parts, focused on the R&D and supply of holographic gratings, lenses, windows and other optical components. The company is certified under the ISO 9001 quality management system, and its products are widely used in high-end fields such as spectral analysis, environmental monitoring and biomedicine. With decades of precision optical manufacturing experience, a mature supply chain and strict quality control, every product delivers excellent quality and stable delivery. 🌏 Overseas sales and technical support is provided by METICULAB™ (Korea).
TAOMSUN Spectroscopy Core Components | 📧 Sales Inquiry taomsun@vip.163.com +86-13862625813 | 🌏 Overseas Sales / Technical Support METICULAB™ (Korea) choikyuc@gmail.com +82-10-3988-4813 💬 WhatsApp / KakaoTalk |
TAOMSUN products are manufactured under the ISO 9001 quality management system. Specifications are typical values and may vary with custom configurations. For OEM/ODM customization, non-standard sizes or special coatings, please contact our sales team. International customers can contact METICULAB (Korea) for Korean/English technical consultation.
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