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Method for a light-source focusing system for microscopes

IP.com Disclosure Number: IPCOM000008490D
Publication Date: 2002-Jun-17
Document File: 3 page(s) / 84K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a light-source focusing system for microscopes. Benefits include improved image quality.

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Method for a light-source focusing system for microscopes

Disclosed is a method for a light-source focusing system for microscopes. Benefits include improved image quality.

Background

              A 10X magnification covers a 400-mm2 (2x2 cm) area. Magnifications of 60X and 200X cover 66.6 and 20 mm2, respectively.

              For each magnification, all the light hitting the area viewed by the magnification is transmitted to the imaging device. If a constant illumination level is used for all magnifications, then the amount of light landing on the 60X and 200X areas are 16% and 5% of the light available for the 10X magnification area, respectively (see Figure 1). This reduction in available light for high magnifications causes the images generated by the imaging device to be noisier and have lower frame rates. Noise is introduced because the gain of the sensor must be turned up to compensate for the fact that there is less light available and the frame rate is reduced to allow more time to collect the few photons that are available. To alleviate this situation, a brighter light source can be used, however this solution draws more power and generates more heat.

General description

              An inexpensive, low-quality lens associated with each objective lens is used to optimally focus the light source on the displayed area of the respective objective lens.

Advantages

              The disclosed method provides improved image quality due to improved illumination and noise reduction.

Detailed description

              The disclosed method places a light source lens between the light source and the illuminated area so that one light source lens is associated with each magnification. The lenses are moved into p...