Medical and Life Science Instruments

What do components in this industry have to carry

The signal-to-noise ratio of in vitro diagnostic equipment directly determines the detection sensitivity. The fluorescence detection module relies on three things: excitation light entering, emission light exiting, and stray light not entering. The wavelength pairing and transition band width between components are the core. In addition, medical equipment needs to be verified before shipment, and batch consistency of components is more important than single item indicators.

Common components

• Dichroic mirror: high reflectivity in the excitation band and high transparency in the emission band, commonly with a 45 degree incidence angle
• Excitation/emission narrowband filter: paired according to the center wavelength of fluorescent dyes (FITC, Cy5, Alexa series, etc.)
• Neutral density filter: used for light intensity attenuation to avoid detector saturation

Key selection points

Please provide the optical path structure of the device (incident angle, spot size), target dye or center wavelength, and the response range of the detector. Most projects require both bandwidth and cutoff depth requirements, otherwise stray light will leak from the transition zone.