资料下载：Download Astro-optics Datasheet (PDF, 330 KB)
Development of optical components for astronomical applications has always been one of Tydex's main lines of business. Since its establishment, the Tydex Company has gained considerable experience in the production of high-precision mirrors, optical lenses, and various unique optical components. As of August 2007, the company has sold more than 360 various astronomical systems such as Cassegrain, Ritchey–Chretien, and others with an aperture of up to diameter 1260 mm. In addition to complete lens/mirror sets, Tydex sold a great many plane, diagonal, spherical, parabolic, and hyperbolic mirrors as well as lens and lens sets for astro-correctors of different specifications, from standard to unique. Today, Tydex's mirrors serve as components of telescopes and research equipment in Germany, France, Italy, Japan, the USA, China, Chile, Taiwan, Korea, and many other countries.
Nowadays, Tydex produces and delivers single high-precision mirrors and complete mirror/lens sets for professional astronomical systems. The company offers spherical, parabolic, hyperbolic, and plane mirrors with reflecting surfaces of various shapes, optical lenses for astro-correctors, and various nonstandard components with different specifications. The range of astronomical systems equipped with Tydex's optical components includes Newton, Cassegrain, Ritchey–Chretien, Maksutov, and Mersen telescopes, astrophotography systems, etc.
Description of standard astronomical systems:
1 – primary element, concave parabolic mirror;
2 – secondary element, plane diagonal mirror.
2 – secondary element, convex hyperbolic mirror.
2 – secondary element, convex hyperbolic mirror;
3 – tertiary element, plane diagonal mirror.
3 – tertiary element, optical corrector.
1 – primary element, concave hyperbolic mirror;
2 – secondary element, convex hyperbolic mirror .
1 – primary element, concave spherical mirror;
2 – secondary element, meniscus lens with a mirrored spot at the center of the convex face.
2 – secondary element, plane diagonal mirror;
2 – secondary element, convex parabolic mirror.
General specifications for astronomic mirrors and systems
Materials:
Astronomical mirrors are usually made of Zerodur (Schott Glass Technologies, Germany) or its Russian prototype Sitall CO-115M (Astrositall), fused silica, Pyrex (Corning Incorporated, USA) or its Russian prototypes LK5 and LK7 glass. Materials are chosen so as to comply with the specifications, operating conditions, and purpose of optical systems.
Surface accuracy:
The experience of our opticians and the available instruments and special equipment allow our company to produce optics with a wavefront accuracy of L/10 at 633 nm or, what is the same, a surface accuracy of L/20.
Surface quality:
All our products fully comply with the internationally recognized MIL-0-13830A standard. The surface quality of the mirrors produced by the company depends on their dimensions:
• 60/40 scratch/dig for linear dimensions up to 400 mm; • 80/50 scratch/dig for linear dimensions up to 800 mm; • 120/80 scratch/dig for linear dimensions more than 800 mm.
Coating:
Protected aluminum is our most popular coating for astronomic mirrors. Upon the Customer's request, we can apply coatings of other types, if the Company's capabilities allow.
Available dimensions and standard specifications:
Spherical mirrors
• Diameters: from 200 mm to 1300 mm; • Wavefront accuracy: up to L/8 at 633 nm (or surface accuracy: up to L/16); • Standard numerical apertures: F/3–F/10.
Parabolic and hyperbolic mirrors
• Diameters: from 200 mm to 1300 mm; • Wavefront accuracy: L/8 at 633 nm (or surface accuracy: L/16); • Standard numerical apertures: F/3–F/10.
Plane elliptic diagonal mirrors
• Minor axis dimension: from 30 mm to 250 mm; • Wavefront accuracy: L/8 at 633 nm (or surface accuracy: L/16).
Standard astronomical systems
• Wavefront accuracy (of a ready-assembled system): L/8 at 633 nm (or surface accuracy: L/16); • Diameters of primary mirrors: from 400 mm to 1300 mm; • Standard numerical apertures of primary mirrors: F/3–F/10; • Standard numerical apertures of systems: F/7–F/20.
Quality assurance
Each astronomical mirror/system is subject to exhaustive testing. The results of testing are documented in a test certificate. The interferograms are subject to numerical analysis. The Customer is provided with all test results and original interferograms (including negatives).
The above types of mirrors and their specifications are standard and do not exhaust all the range of products that can be offered. For more about the Company's production potentialities, prices, and delivery times, please contact us.
