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Being a custom manufacturer, and having no products of our own, the A. J. Tuck Co. makes components for a wide variety of industries, some shown here. We are always eager to get into more industries, and are constantly taking on new jobs that we haven’t done before. Some that we have done follow.

Coldshields for Infrared Detectors and Cameras

Infra-red cameras and detectors are like digital cameras, only the pixel system is sensitive to the infrared spectrum instead of the visible light spectrum; a lower frequency than visible light in the Electromagnetic Spectrum.  Also, putting a box around the pixel system (chip), as in a photo camera, won’t work because infrared energy, which is heat, will come right through the sides of the box.  Also, all high end IR cameras and detectors operate at cryogenic temperatures, so the pixel system and surrounding items must be instantly cooled down, especially for military applications.  We make thin walled metal shells that go over the pixel systems upon which the lenses are mounted called Coldshields.  They must be metal and thin walled to cool down quickly. The outside surfaces must be gold plated to reflect IR energy coming in from the sides, and the interior surfaces must be blackened to absorb IR energy coming through the lens at an angle.  Also, the interior surfaces must have complex geometric shapes with extremely accurate dimensions to achieve the “3 bounce rule” for dissipating any stray IR radiation entering the lens on an angle, so the pixel array only sees what the camera or sensor is aimed at, and is not blurred by stray radiation.

We make coldshields to customer’s designs per the attached photo.  We also have a reflectance meter so we can record and send to our customers the IR reflectance data of the exterior gold coating and the IR absorbance of the interior black coating, both of which we supply tested on coupons run with the parts.

Waveguides for Microwave Transmission

Microwave energy that is transmitted through air or space, must also be transmitted from the antenna to the mechanism that deciphers the information.  This is usually done with a metal tube called a Waveguide that has internal dimensions relative to the physical band width size of the radio frequency energy passing through it.  The higher the frequency, the smaller the RF band width and the waveguide tube dimension.  Also, the RF engineers put geometric features inside the waveguides that alter the signal to do what they want it to.  These features require very high precision dimensions.  Most waveguides are made by assembling extruded tubing, castings, and machined parts, but for many really close tolerance and complex waveguides the only way to achieve the internal dimensions needed is by electroforming.  We make a wide variety of microwave components for our customers including millimeter waveguides, filters, orthomode transducers, magic T’s, diplexers, mode converters and horn or dish antennas as seen in the attached photos, and have been doing this for air and space microwave transmission since the 1950’s.  The smaller photo shows microwave antenna horns for receiving satellite TV on airplanes.

 

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