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Welcome to uis2/uis optics – Olympus Microscope User Manual

Page 4

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light between the objective lens and tube lens,

allowing the creation of user-specific or task-

specific optical systems. To establish real flexibility

with such a system, it is necessary to eliminate the

occurrence of coma aberration.

*In UIS2/UIS objective lenses, the parfocal distance is designed

at 45mm and the focal length of the tube lens is 180mm.

Basic dimensions of UIS2/UIS optical system

The UIS2/UIS optical system optimally corrects

aberration with a dedicated telan lens and an

eyepiece so that the coma aberration and flatness

are not degraded even when the telan lens exit

pupil position is changed by changing the

objective lens and telan distance. This makes it

possible to use a distance of 50mm to 170mm

from objective lens mounting position to the single

port tube with lens.

*Coma aberration: refer to the optical terminology at the end of

this document.

What's infinity-corrected optics?

UIS2/UIS optics is an infinity-corrected optical

system — in other words, a system in which light

passes from the specimen through the objective

lens without forming an image along the way.

Instead, it travels in the form of infinity parallel rays

to the tube lens. The tube lens is where the

intermediate image is formed, whereas in finite-

corrected optics, this is done by the objective lens.

Advantages of infinity-corrected optics

This system, known as "infinity-corrected optics",

offers a number of advantages:

There is no change in magnification even when

the distance between the objective lens and tube

lens is altered.

With the total magnification remaining constant,

there is no image aberration — even when

prisms or sliders are interposed between the

objective lens and the tube lens.

As thousands of users have found by experience,

these advantages are crucial to composing the

ideal microscope optical system. What's more, it

is even possible to freely insert or remove

intermediate attachments in the parallel rays of

Figure 1 Infinity-corrected and
finite-corrected optical system principles

Infinity-corrected optical system

Finite-corrected optical system

Parallel light beam

Eyepiece

Eyepiece

UIS/UIS2
objective lens

Objective
lens

Tube lens

Intermediate

image

Intermediate

image

3

WELCOME TO UIS2/UIS OPTICS

UIS2/UIS:

The System That Maximizes The Advantage Of Infinity-Corrected Optics

Figure 3 Basic dimensions of UIS2/UIS2
optical system

Objective lens

U-TLU
(Single port tube with lens)

Image

Recommended distance

50-170mm

* 40mm

45mm

* 84mm

57.6mm

102mm

*Basic dimensions when our revolving nosepiece and illuminator are
combined. When the position of the illuminator above is changed,
illumination performance cannot be maintained.

Figure 2 Advantages of Infinity-corrected
optical system

Infinity-corrected optical system

Finite-corrected optical system

Objective
lens

Tube lens

Objective
lens