Schmidt camera optical axis of the Schmidt design creates a Schmidt-Newtonian telescope. The addition of a convex secondary mirror to the Schmidt design directing light through a hole in the primary mirror creates a Schmidt-Cassegrain telescope. The last two designs are popular with telescope manufacturers because they are compact and use simple spherical optics. A short list of notable and/or large aperture Schmidt cameras. Schmidt camera A Schmidt camera, also referred to as the Schmidt telescope, is a catadioptric astrophotographic telescope designed to provide wide fields of view with limited aberrations. The design was invented by Bernhard Schmidt in 1930. Some notable
Schmidt decomposition of "ρ" on either subsystem have the same spectrum. The strictly positive values "formula_9" in the Schmidt decomposition of "w" are its Schmidt coefficients. The number of Schmidt coefficients of formula_4, counted with multiplicity, is called its Schmidt rank, or Schmidt number. If "w" can be expressed as a product then "w" is called a separable state. Otherwise, "w" is said to be an entangled state. From the Schmidt decomposition, we can see that "w" is entangled if and only if "w" has Schmidt rank strictly greater than 1. Therefore, two subsystems that partition a pure state are entangled if