Mitutoyo M Plan UV Objectives - 50X or 80X

Series 378 Objectives - M Plan UV for Brightfield Observation

• The Mitutoyo 378 Series objectives have the world's longest working distance and an infinity correction optical system.
• These objectives provide flexible observation at high magnifications and independent correction of chromatic aberration.
• Long working distance objectives provide excellent clearance between the lens surface and the workpiece surface in focus, making it possible to observe features that are usually hard to bring to focus because of awkward projections.
• Specially designed objectives are also available with correction for near-infrared, near-ultraviolet, and ultraviolet, or for observing through LCD screen glasses.
• The mounting screw threads of objectives are designed to conform to JIS B-7141-1988.

Note: Focal length and focal depth for objectives are specified at a reference wavelength of 0.55 µm irrespective of working wavelength.

Stable parfocal distance with an operating wavelength

Ultraviolet Corrected

These ultraviolet corrected objectives are designed so that a workpiece's image remains substantially in focus even when the wavelength used is changed anywhere from the visible range (λ = 550 nm) to the ultraviolet (λ = 266 nm). Therefore the M Plan UV Series is suitable for laser repair applications.