ACHROMATIC OIL IMMERSION MICROSCOPE OBJECTIVE WITH LARGE MAGNIFICATION Russian patent published in 1994 - IPC

FIELD: optical instrument engineering. SUBSTANCE: objective has front component 1 i form of single flat-convex lens or meniscus-shaped lens, turned with its convexity to image space, positive meniscus 2, turned with its concavity to space of objects, positive two-glued component 3, which has positive and negative lenses, three-glued component 4, which has positive lens, mounted between two negative lenses, and negative meniscus 5, turned with its concavity to image space. Magnification of the lens is equal to 100^×, focal length equals to 1,604 mm, linear field of view in the space is equal to 2y′=20,0mm. EFFECT: improved precision. 1 dwg