In scientific research tests such as ultraviolet-visible absorption spectra, reflection spectra, material steady-state light response, and radiation calibration, halogen tungsten lamps are the standard reference light sources in laboratories due to their continuous and smooth visible-to-near-infrared spectra. Many researchers often encounter the following issues in experiments: the output of the light source drifts with fluctuations in the power grid, the light intensity decays during long-term scanning, and the startup impact current shortens the lifespan of the lamp tube, resulting in unstable baselines, discrete parallel sample data, and repeated calibration consuming a lot of time.

A stable light source system is centered around a reliable power supply. The 7IPT250B halogen tungsten lamp constant current power supply, developed specifically for 250W halogen tungsten lamp sources, is compatible with the 7ILT series halogen tungsten lamp source chambers, providing continuous and high-precision constant current output for spectral experiments. It stabilizes the luminous flux at the power supply end, eliminating experimental errors caused by power supply fluctuations.

The 7IPT250B uses a precise constant current control circuit and is used in conjunction with the corresponding halogen tungsten lamp source. The light flux fluctuation is as low as 0.12% to 0.2%, and the light intensity drift is extremely small during long-term continuous collection. Even for long-term spectral scanning and continuous testing of multiple samples, the baseline stability is stronger, reducing the need for repeated calibration, ensuring the consistency of multiple parallel experimental data, and allowing the spectral curve to truly reflect the characteristics of the sample, providing reliable support for the data in the paper. Beijing Sefan Optics... 。

To address the issue that the tungsten filament of halogen lamps is prone to being damaged by shocks during cold start-up, the power supply is equipped with a soft start mechanism, which gradually increases the output current and suppresses the large current shock at the moment of startup. This effectively protects the tungsten filament and extends the service life of the halogen lamp tube, reducing the frequency of laboratory consumables replacement and operational costs. The entire machine integrates multiple safety protections, including overcurrent and overheating protection, and automatically cuts off the output in abnormal conditions to protect the light source equipment and the safety of the experimental personnel.

The panel supports continuous adjustable current, allowing for the change of output power as needed, and flexible control of the light source intensity, meeting the requirements of control experiments under different samples and irradiation conditions. The standardized output interface is convenient for installation and debugging, and can be directly matched with Sefan monochromators, sample chambers, filter wheel sets, and spectral detectors to quickly build a complete spectral testing optical path; it can also be used as an independent light source driving unit or integrated into a composite light source system, widely used in universities, research institutes, and enterprise R&D centers.

The applicable scenarios cover solid reflection spectroscopy, liquid absorption spectroscopy, thin film optical property characterization, light source radiation calibration, steady-state testing of photovoltaic materials, etc., and is a classic supporting equipment for visible light band spectral characterization.

The domestic precision optical instrument solution takes into account the stability performance, delivery cycle, and cost advantages. Sefan Optoelectronics 7IPT250B halogen lamp power supply, with stable and controllable constant current drive, holds the bottom line of light source output, reduces interference from variable power supply, and helps spectral research experiments to be carried out efficiently.