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The 77330 by Newport is a Focusing Lens Assembly that is designed for seamless integration with Oriel Monochromators and Spectrographs. Tailored to enhance optical performance, this assembly serves the purpose of re-imaging a primary light source onto the input slit of the instrument, or alternatively projecting the monochromator's output onto a designated detector, sample, or fiber. Optimal for scenarios where meticulous alignment is not a prerequisite, particularly in cases involving larger light sources and targets, the 77330 assembly offers distinct advantages. Notably, it does not possess XY image adjustment capabilities. Its design accommodates any 1-inch diameter lens and features a generous 0.8-inch clear aperture.

The 77330 assembly has an interchangeable lens configuration and a substantial total focus adjustment range of 2.9 inches. Consequently, it can function adeptly both as a collimating and focusing assembly for diverse light source applications. Encased within a precisely engineered lens barrel complete with a focusing sleeve, the 77330 assembly accommodates a single lens element. The focal length adjustment is facilitated by a dedicated focusing lever, complemented by tapped holes within the lens barrel that allow users to define the range of focal adjustments. Installation is streamlined as the assembly seamlessly interfaces with monochromators and various instruments boasting a 1.5-inch female and male flange. Notably, the beam paths are meticulously enclosed, ensuring optimal optical integrity and alignment of the optical axes. It is recommended to use a 32mm focal length lens with an impressive focused beam focal number of F/4. Additionally, the distance from the flange to the slot plane on compatible monochromators and spectrographs measures at 0.74 inches.