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Drafting pantograph in use Pantograph used for scaling a picture. The red shape is traced and enlarged. Pantograph 3d rendering. A pantograph (from Greek παντ- 'all, every' and γραφ- 'to write', from their original use for copying writing) is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical ...
A density cup is an instrument that is used to ensure quality control in a paint or lacquer. [1] It does this by measuring the density of the paint or lacquer, and comparing this density with the density of a standard for that paint or lacquer. [ 2 ]
An optical instrument is a device that processes light waves (or photons), either to enhance an image for viewing or to analyze and determine their characteristic properties. Common examples include periscopes , microscopes , telescopes , and cameras .
Almost all model kits on the market were plastic, necessitating paints (the square, glass Testor paint bottles were sold in almost every dime store, department store, hardware store, toy store and hobby store in the US in the 1960s, making them truly ubiquitous) and glues different from those used for wooden models.
Paint This with Jerry Yarnell is an educational television show produced by Jerry Yarnell, owner of the Yarnell School of Fine Art. It is broadcast primarily on public television channels. The show focuses mostly on landscape , wildlife , and Western American themes, in the impressionist style.
In theatrical productions, an instrument schedule is a listing of all the lighting instruments and information about them used in a show. [1]: 223 The instruments are organized by their position on-stage, and is the distinguishing characteristic between an instrument schedule and a channel hookup or similar paperwork. The instrument schedule ...
With any telescope, microscope or lens, a maximum magnification exists beyond which the image looks bigger but shows no more detail. It occurs when the finest detail the instrument can resolve is magnified to match the finest detail the eye can see. Magnification beyond this maximum is sometimes called "empty magnification".
A color scroller, color changer, or "scroller" is a lighting accessory used to change color gels on stage lighting instruments without the need of a person to be in the vicinity of the light. [5] It is attached in the gel frame holder on the outside of a lighting instrument, immediately in front of lens assembly.