NIR objective lens

Our NIR objectives are particularly well suited for the following applications:

• Deep tissue imaging
• Multiphoton microscopy
• Semiconductor inspection and failure analysis

NIR objectives use broadband multilayer anti-reflection coatings to reduce reflectance to extremely low levels, minimizing losses in the near-infrared region. In conventional objectives, lens elements inevitably absorb NIR light and convert it into heat, and the resulting temperature changes cause slight variations in lens spacing and curvature. In contrast, NIR objectives employ low–thermal-expansion materials along with active/passive thermal stabilization designs to minimize the effects of temperature fluctuations.

Thanks to their high transmittance, high numerical aperture, and semi-apochromatic correction, NIR objectives are exceptionally well suited for multiphoton microscopy.

Q: How should I choose the appropriate numerical aperture (NA)?
A: Numerical aperture primarily affects resolution, light-collection efficiency, and working distance. Higher NA provides higher resolution and stronger light-gathering capability (leading to brighter images), but it also results in a shorter working distance, shallower depth of field, and higher cost.