Browse Prior Art Database

Darkfield Illuminator Attachment

IP.com Disclosure Number: IPCOM000043992D
Original Publication Date: 1984-Oct-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Goodman, DS: AUTHOR

Abstract

A simple attachment for microscopes provides darkfield illumination for standard objectives without the need for a costly special illumination system. The device is a cylinder with a highly reflective diffuse interior wall 11. It clamps to a microscope objective 12 with set-screws or thumbscrews. Light 13 is admitted through one or more holes in the wall with a range of directions so that none goes directly to the object 14. In one embodiment, fiber bundles are used to bring in the light. The light is randomized by multiple reflections off the objective and the diffuse wall, finally leaving at the bottom. The light that reaches the object has a range of angles outside the collection angle of the objective, so the illumination is darkfield.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Darkfield Illuminator Attachment

A simple attachment for microscopes provides darkfield illumination for standard objectives without the need for a costly special illumination system. The device is a cylinder with a highly reflective diffuse interior wall 11. It clamps to a microscope objective 12 with set-screws or thumbscrews. Light 13 is admitted through one or more holes in the wall with a range of directions so that none goes directly to the object 14. In one embodiment, fiber bundles are used to bring in the light. The light is randomized by multiple reflections off the objective and the diffuse wall, finally leaving at the bottom. The light that reaches the object has a range of angles outside the collection angle of the objective, so the illumination is darkfield. The range of angles can be controlled to some extent by moving the attachment up and down.

1

Page 2 of 2

2

[This page contains 1 picture or other non-text object]