TTL165-A is a high-performance tube lens designed for infinity-corrected microscopy systems. Featuring a focal length of 165 mm and an anti-reflective coating covering the 350-700 nm visible band, it utilizes external SM2 threads for easy integration with various imaging systems.

The key advantage of this product lies in its infinity-corrected optical design. In an infinity-corrected system, light exiting the objective is collimated, and the tube lens converges this parallel beam to form an intermediate image. This design enables flexible insertion of optical accessories such as DIC prisms, polarizers, and fluorescence filter cubes into the parallel optical path without introducing additional aberrations or shifting the focus position.The TTL165-A features achromatic correction, delivering diffraction-limited imaging across the entire field of view. It effectively corrects axial chromatic aberration and spherical aberration, ensuring high-resolution image quality. The 165 mm focal length is a standard tube lens specification compatible with Zeiss and other major microscopy systems. This lens supports both widefield imaging and laser scanning applications, making it suitable for confocal microscopy, laser scanning systems, and custom-built imaging setups.

This tube lens is compatible with infinity-corrected objectives from leading brands including Thorlabs, Nikon, Olympus, Zeiss, Leica, and Mitutoyo, making it an ideal optical component for research-grade microscopy systems.