This Texas Instruments math coprocessor was removed from a discarded motherboard originating in a Hewlett-Packard RISC computer. The chip is not particularly noteworthy, but it does appear beautiful under oblique illumination with colored gels in the QX3 microscope.

The digital images presented above were captured using the oblique illuminator built into the microscope head with the assistance of a Dolan-Jenner Model 180 fiber optics illuminator using a 150 watt projection lamp. The light pipes of the illuminator were placed at approximately a 45-degree angle with respect to the optical axis of the microscope and were positioned to evenly illuminate the specimen. In many cases, colored gels were placed into filter holders and attached to the front of the light pipes to add color to the chip surfaces. A 2-inch square section of black paper was placed over the diffusion filter on the stage of the microscope to avoid any glare from transmitted illumination.

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