In precise scientific research scenarios such as spectral analysis, photometric calibration, photocatalysis research, biological fluorescence detection, and material optical characterization, stray light interference, insufficient spectral resolution, wavelength drift, and excessively high baseline noise are the core culprits that hinder weak signal testing, precise spectral line analysis, and data reproducibility. Ordinary single-grating spectrometers are limited by their single-pass spectroscopic mechanism and cannot filter out higher-order diffraction and environmental stray light, easily masking weak spectral features, thereby limiting experimental accuracy and reducing the credibility of conclusions.

To achieve standardized spectral testing across the ultraviolet-visible-near-infrared spectrum with high purity and high resolution, a cascaded precision spectroscopic architecture must be relied upon. The Sefan Optoelectronics dual-grating scanning spectrometer, based on over two decades of self-developed photoelectric technology, adopts a dual-grating cascaded spectroscopic core architecture, combined with an optimized optical path and a fully automatic electronic scanning system, achieves extreme low stray light, nanometer-level high precision, and long-term high stability, addressing the testing shortcomings of traditional spectrometers and becoming the mainstream spectrometric analysis equipment for universities, research institutes, optoelectronic enterprises, and precision testing institutions.

Dual-grating cascaded spectroscopy, with extreme suppression of stray light, achieves maximum spectral purity

Unlike the inherent defects of conventional single-grating equipment, which have single-pass spectroscopy and incomplete stray light filtering, the equipment adopts dual-grating secondary cascaded spectroscopic technology, layer by layer filtering higher-order diffraction light, scattering light, and environmental background stray light. The suppression ability of stray light is significantly enhanced, eliminating baseline noise and spectral line spurs from the optical root. It is particularly suitable for high-difficulty experiments such as ultraviolet weak signal detection, micro-sample spectral analysis, low-frequency Raman testing, and weak fluorescence signal acquisition, accurately extracting the fine spectral information submerged by noise, outputting baseline straight, feature clear, and highly reproducible pure spectral data, fully meeting the strict data requirements for journal publication, project initiation, and measurement calibration.

Optimized optical path design, with nanometer-level ultra-high spectral resolution

The entire machine is equipped with an asymmetric compensatory C-T optical path structure, effectively correcting optical aberrations and eliminating spectral distortion, significantly improving spectral resolution. It can precisely distinguish overlapping spectral lines, capture energy level transitions, molecular vibrations, etc., and micro-spectral changes. Combined with a high-precision precision screw drive system, there is no return error, no mechanical zero clearance, and the minimum wavelength scanning step can reach 0.0625 nm. The positioning is precise, the response is linear, and it can achieve nanometer-level high-precision spectroscopic positioning for both wide-band continuous scanning and fixed-point wavelength locking tests, suitable for various ultra-high-resolution spectral detection scenarios.

Fully automatic intelligent scanning, flexible adaptation to multiple scenarios

The equipment is equipped with an intelligent electronic control system, supporting computer automatic control, and can complete all operations such as grating switching, automatic matching of filters, continuous wavelength scanning, and fixed-point wavelength locking with a single click, eliminating the problems of manual debugging in traditional equipment, large human error, and cumbersome operation. It is equipped with USB and RS232 dual communication interfaces, plug-and-play, stable transmission, and compatible with various terminal devices. It can flexibly select different specifications of gratings to fully cover the ultraviolet, visible, and near-infrared spectral range, capable of meeting both wide-band全域 scanning detection and single-color light precise output， suitable for various experimental schemes.

Stable and anti-drift， suitable for long-term continuous testing

For long-term stable laboratory experiments and industrial high-frequency batch detection conditions， the entire machine adopts a fully metal integrated stable body and wear-resistant transmission structure， with long mechanical life， anti-vibration， and anti-temperature drift. Long-term continuous operation has no optical path offset， no wavelength drift， and no precision attenuation. After rigorous high and low temperature， aging， and vibration tests， it has excellent environmental adaptability， completely solving the problems of data jump and poor stability in traditional spectrometers during long-term testing， and perfectly adapting to long-term experimental scenarios such as aging monitoring， dynamic spectral tracking， and long-term signal acquisition.

The equipment has extremely strong scalability and can seamlessly connect with all the xenon light sources, steady-state light sources, photoelectric detectors, optical position shift tables and other supporting equipment of the Sefan series. It can quickly build an integrated and standardized spectral testing platform. It is widely applicable to various scientific research and industrial scenarios such as solar cell spectral response calibration, photodetector performance testing, photocatalytic kinetics research, biological fluorescence spectral analysis, optical characterization of nanomaterials, environmental spectral monitoring, and optical device transmittance/reflectance testing. Its versatility and practicality are outstanding.

Thanks to its robust optical performance and long-term stable measured results, the Sefan photoelectric dual grating scanning spectrometer has been widely used in major universities, research institutes and photovoltaic enterprises across the country, becoming a benchmark main equipment in the field of precise spectral analysis.

Dual grating cascaded anti-jitter | Nanometer-level ultra-high resolution | Fully automatic intelligent scanning | Ultra-low drift and high stability | Full spectral coverage | System easy integration

Accuracy determines the credibility of data, purity determines the upper limit of experiments. The Sefan photoelectric dual grating scanning spectrometer clears test interference with its cascaded optical core technology, and safeguards research accuracy with exquisite quality, making each spectral detection more precise and each set of experimental data more reliable!