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Star Instruments, a leading manufacturer of Ritchey-Chr tien optical systems, and RC Optical Systems, Inc, a leading manufacturer of Ritchey-Chr tien telescopes, today announced that Meade Instruments Corporation and its dealers have effectively signed a settlement agreement to rename their RCX400 and LX200R line of telescopes that they claimed contained "Advanced Ritchey-Chr tien" optics. a) not place any new magazine advertising which states that the LX200R, the RCX400 or any catadioptric or refractor telescope is a "Ritchey-Chr tien"; b) ensure that none of their advertising states that the LX200R, the RCX400 or any catadioptric or refractor telescope is a "Ritchey-Chr tien"; c) remove the "R" from the model number of the LX200R and the "RC" from the model number of the RCX400, and shall not thereafter use "RC", separately or in combination with other letters such as "ARC, " to identify telescope models that are not a two-mirror optical system utilizing a concave hyperbolic primary mirror and a convex hyperbolic secondary mirror without any lens or refractor; and d) not describe any telescope as "Ritchey-Chr tien" unless it is a two-mirror optical system utilizing a concave hyperbolic primary mirror and a convex hyperbolic secondary mirror without a lens or refractor. Paul Jones, Owner-Optician of Star Instruments who has been manufacturing Ritchey-Chr tien optics for over 30 years, stated: "RC Optical Systems and I are pleased to have successfully defended our principles to preserve the integrity of the optical design invented by American astronomer George Ritchey and French Astronomer Henri Chr tien in the early 1910s. This design continues to be the premiere optical design in telescopes and observatories throughout the world including the Hubble Space Telescope." He further stated that "Truth in advertising prevailed in this case. The "coma-free" Schmidt-Cassegrain design was first published in the early 60's by Ronald Willey in Sky & Telescope magazine. While this design eliminates coma, it does have serious spherochromatism making it less desirable for astrophotography and unusable out of the visible spectrum as compared to the Ritchey-Chr tien design." ABOUT STAR INSTRUMENTS Established in 1976, Star Instruments is a leading manufacturer and supplier of professional-quality custom optics. Specializing in Ritchey-Chretien optical systems for manufacturers of quality tube assemblies and complete telescopes, universities and government agencies including NASA, the company designs, fabricates and performs testing of custom optical systems including Classical Cassegrain, ultraviolet, visual and infrared applications as well as mirrors and lens systems at its headquarters in Newnan, Georgia. Visit for more information. If you do not have Adobe Reader installed on your computer you may download a free version by clicking here.

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