Olympus OM system close-up and macro equipment

Aperture Iris Diaphragm

Introduction

The Aperture Iris Diaphragm was designed for use with the Trans-Illuminator Base XD-E. It is shown in brochures and instruction manuals for the Olympus X stereomicroscope, and it is listed and illustrated as an optional accessory in some SZ-III stereomicroscope brochures. It seems to have been discontinued before the Olympus OM system was introduced.

It is an accessory to control the beam of trans-illumination or to provide oblique illumination.

Aperture Iris Diaphragm

Versions

Only one version is known

Instructions

Aperture Iris Diaphragm

Turning the XD-E upside-down makes it easier to attach the iris apparatus.

The iris apparatus is attached to the under side of the top of the XD-E with four screws. The iris frame 55 protrudes above the top plate of the XD-E, and the iris positioning lever 54 passes through the small hole in the front of the top.

To attach the iris apparatus to the X-DE, carefully locate it with the iris positioning lever 54 passing through the small hole in the front of the top of the X-DE, and the iris frame 55 seated in the large hole in the top of the X-DE. Position the four screws above the four threaded holes, and tighten the screws.

If the iris apparatus is not seated properly, it can restrict adjustment of the mirror.

The three iris clamp screws 51 can be loosened so that the iris frame 55 can be rotated, to adjust the position of the aperture lever 53.

The iris may be opened or closed by horizontal movement of the aperture lever 53, producing an aperture adjustable from 2 mm to 40 mm in diameter. By pulling and pushing (not rotating) the iris positioning lever 54, oblique illumination can be obtained.

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Olympus OM system close-up and macro equipment