355nm（Nd:YAG 三次谐波）带通滤光片

355nm 光是一种特定的紫外线 (UV) 波长，具有高能量、窄光谱带宽和精确的光学特性，能够选择性地传输此精确波长的光，同时阻挡相邻的光谱区域。

应用 1 ：在荧光显微镜中，通过阻挡背景噪声和不需要的波长来从样品中分离和检测微弱的 355nm 激发荧光信号，从而提高细胞或分子成像的清晰度。
应用 2 ：在半导体制造中，用于紫外光刻工艺中的精确波长控制，通过滤除可能影响成像精度的无关光，确保在微芯片制造过程中将图案准确地转移到光刻胶层上。
应用 3 ：在分析光谱中，通过消除复杂样品中其他光谱成分的干扰，实现对在 355nm 处吸收或发射的物质（例如特定有机化合物或荧光标记）的高灵敏度检测和量化。

Third-harmonic Nd:YAG / Nd:YVO₄ laser at 355nm

Use CWL 355nm with 3–10nm FWHM for 355nm third-harmonic laser line cleanup, source isolation, or detector-side laser signal selection.

355nm is commonly generated as the third harmonic of 1064nm Nd:YAG or Nd:YVO₄ lasers. For laser-line filtering, key specs include CWL match near 355nm, FWHM, transmission at 355nm, OD blocking over the unwanted wavelength range, and laser power handling for the beam size.

355nm UV laser spectroscopy or excitation

Use CWL 355nm with 3–10nm FWHM for UV laser spectroscopy, laser-induced fluorescence, or narrow excitation cleanup.

For UV laser excitation systems, the filter helps define the 355nm source band before the sample or optical path. The main selection points are CWL accuracy, FWHM, transmission at 355nm, blocking range, and coating suitability for the UV beam condition.

Broadband UV source filtering

se CWL 355nm with 30–60nm FWHM to select a useful UV band from xenon, deuterium, mercury-xenon, or other broadband UV sources.

For broadband UV illumination or measurement, the filter extracts a 355nm-centered band from a wider spectrum. Use 30nm FWHM for more defined UV-band selection, or 60nm FWHM when higher transmitted UV signal is more important for illumination, inspection, or detection.

Detector-side 355nm signal isolation

Use CWL 355nm with 3–30nm FWHM before a UV-sensitive photodiode, PMT, UV spectrometer, or UV-capable camera when the target signal is near 355nm.

For detector-side filtering, the filter improves signal-to-background ratio by passing the 355nm signal and reducing unwanted UV or visible background. Use 3–10nm FWHM for stronger 355nm isolation, or 30nm FWHM when more signal level is needed.