LENSTEK offers a comprehensive selection of objective lenses, scanning lenses, GRIN lenses, and tube lenses, addressing a broad spectrum of technical requirements from UV laser processing to multiphoton bioimaging. In the category of microscope objectives, we provide infinity-corrected visible-light imaging objectives suitable for brightfield, darkfield, and fluorescence applications across the visible spectrum. We also offer reflective objectives for broadband applications, which maintain excellent focusing performance from UV through visible to near-infrared without chromatic aberrations, making them ideal for spectroscopic imaging and OCT systems. For multiphoton physiology imaging, LENSTEK has developed dedicated physiology objectives featuring long working distances, high infrared transmittance, and large field of view, meeting the demands of deep-tissue calcium imaging and neural circuit recording in living preparations. Our high-power focusing objectives are specifically designed for Nd:YAG laser sources (1064 nm, 532 nm) and UV lasers (355 nm, 266 nm), incorporating damage-resistant optical coatings and low-thermal-expansion substrates to reliably withstand millijoule-level high-energy pulses, widely used in laser drilling, precision cutting, and material ablation. Regarding GRIN lenses, LENSTEK provides broadband anti-reflection coated versions that serve as imaging relays when implanted into biological tissues or microdevices, enabling high-resolution imaging of microstructures in applications such as deep-brain optical recording, endoscopic microscopy, and compact optical path integration. For scanning imaging and laser processing, LENSTEK offers two core products. The first is the infinity-corrected telecentric scanning lens for laser imaging applications including OCT microscopy, ensuring normal beam incidence and uniform spot size across the entire scan field, significantly improving lateral resolution and imaging consistency. The second is the F-theta scanning lens designed for 1064 nm infrared lasers, featuring a linear image height versus field angle relationship and excellent distortion control, suitable for laser marking, engraving, cutting, and large-area high-speed scanning. Furthermore, our infinity-corrected tube lenses are perfectly matched with infinity-corrected microscope objectives, serving as ideal tube lens components for building modular microscope systems, widefield imaging setups, and multichannel fluorescence platforms. All LENSTEK products support custom focal lengths, working distances, and mechanical interfaces, with our technical team providing comprehensive support from component selection to system integration.