Last edited by Dujar
Tuesday, August 11, 2020 | History

2 edition of Proceedings of the 1997 Telescope Mirror Coating and Cleaning Conference found in the catalog.

Proceedings of the 1997 Telescope Mirror Coating and Cleaning Conference

Telescope Mirror Coating and Cleaning Conference (1997 Anaehoomalu Bay, Kohala Coast, Hawaii)

Proceedings of the 1997 Telescope Mirror Coating and Cleaning Conference

13 November 1997, the Royal Waikoloan Hotel, Anaehoomalu Bay, Kohala Coast, the island of Hawaii

by Telescope Mirror Coating and Cleaning Conference (1997 Anaehoomalu Bay, Kohala Coast, Hawaii)

  • 233 Want to read
  • 39 Currently reading

Published by Canada-France-Hawaii Telescope Corporation in Kamuela, Hawaii .
Written in English

    Subjects:
  • Mirrors -- Cleaning -- Congresses.,
  • Reflecting telescopes -- Maintenance and repair -- Congresses.

  • Edition Notes

    Includes bibliographical references.

    Statementedited by Barney Magrath.
    ContributionsMagrath, Barney., Canada-France-Hawaii Telescope Corporation.
    Classifications
    LC ClassificationsQB88 .T441 1997
    The Physical Object
    Pagination127 p. :
    Number of Pages127
    ID Numbers
    Open LibraryOL18752231M

    The coating process for telescope optics involves the use of metal oxide compounds as starting materials. The two most common compounds for telescope optics are silicon monoxide and titanium monoxide. C-1 and C-2 Primary Mirror Coatings. Diameter C-1 C-2 " $ $ " $ $ " $ $ Mirror Cleaning Proceedure;. Giordano, P., , “Operational Strategy in the Research of Cleaning Techniques for the VLT Mirrors”, VLT Doc. VLT-TRE-ESO–, , contribution presented at the Conf. “Mirror Coatings and Cleaning”, Waikaloa, Hawaii, Nov. Google Scholar.

      The new coating technology being developed at UC Santa Cruz could make that feasible. The researchers are using a technique called atomic layer deposition (ALD), which gradually builds a thin film of material, one molecular layer at a time, with excellent uniformity, thickness control, and conformity to the surface of the substrate. Several of the smaller mirrors in the telescope, the tertiary mirror and the fine steering mirror, were coated in The secondary mirror was finished earlier this year. Quantum Coating Inc. (QCI) is under contract to Ball Aerospace and Northrop Grumman. QCI constructed a new coating facility and clean room to coat the large mirror segments.

    We have been coating Primary Telescope mirrors for over 40 years. Often referred to as aluminising, re-aluminising, coating, re-coating, silvering or re-silvering To order our Telescope Mirror re-coating service, please choose the correct process for your Primary Mirror size and Secondary mirror . Removal of the old coating is done at no charge. Turn around time is generally 1 week or less. We can coat primary mirrors with Al/SiO up to 18” in diameter. Please call for current pricing. *Majestic Optical Coatings provides the following companies with high quality telescope mirror coatings.


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Proceedings of the 1997 Telescope Mirror Coating and Cleaning Conference by Telescope Mirror Coating and Cleaning Conference (1997 Anaehoomalu Bay, Kohala Coast, Hawaii) Download PDF EPUB FB2

Title: Proceedings of the Telescope Mirror Coating and Cleaning Conference [a book] (Catalog record) Abstracts for the papers available online and linked from the catalog record.

Title: Forestry impacts on freshwater habitat of anadromous salmonids in the Pacific Northwest and Alaska [a government document] (Catalog record).

Metrology and cleaning techniques for telescope mirrors are generally well established. CO 2 cleaning and water washing are mainly used. Water washing has proven to be the best method of removing oil and water stains and restoring the aluminium to nearly fresh : Maarten F. Blanken, Alan K. Chopping, Kevin M.

Dee. This cleaning procedure can be used out in the field and even with the mirror in the telescope for 18” and larger diameters. Please note that you cannot clean the edge sidewall and the back of the mirror if you elect to clean it in the telescope.

Use the same procedure for the diagonal mirror. The equipment for the coating and its preparation are located at the ground floor of the telescope enclosure. There are two trolleys for carrying the mirror cell and the mirror itself, a mirror lifting jig, a washing facility for the primary mirror (PMWF), the water purification system, the coating chamber and the waste water pit.

cleaning, which is not good. If the telescope is being used night after night in cold weather, store it in a cold but dry place, such as an unheated garage with a dry concrete floor.

This will avoid condensation, and shorten cool-down time. A word of caution: Clean optics only when absolutely necessary.

Vigorous cleaning can do far more harm. This page discusses the following topics related to mirror coatings: Silvering, Aluminizing, Enhanced Reflectivity Coatings, and Removing a Coating. Traditional Silvering In the early days of amateur telescope making, before vacuum coating services were widely available, silvering was how mirrors were made reflective.

CONFERENCE PROCEEDINGS Papers Presentations Journals. Advanced Photonics Southern African Large Telescope (SALT) project: progress and status after 2 years. Fabrication of mirrors for the Magellan Telescopes and the Large Binocular Telescope.

CLEANING MIRRORS. A new technique for entire mirrors or just small areas and minor spots. The bathing technique described elsewhere on this site works very well for a general cleaning but bathing has been suspected of allowing water to get under the coating if excessive cleaning is done.

The mirror's coating becomes much harder after several years making the cleaning process easier. Sky and Telescope March issue has a good article on mirror care. Among other good suggestions they recommend using cotton balls for swabbing the mirror.

And they recommend using only one light sweep per cotton ball to avoid scratching the. Page 1 of 2 - Mirror coating questions - posted in Reflectors: I have a pretty new large mirror going on + years and just for a lark as the clouds rolled in last night I propped my flashlight on the ground behind the mirror cell for the first time.

Much to my dismay there were about 8 or 9 pinholes, a small constellation as it were, shining through the dark surface of the mirror. The reflectivity and scatter of several large telescope mirrors have been measured immediately after coating and after various use times.

Mirrors evaluated inside those of the AEOS m Telescope and the SOR m Telescope. Reflectivity and scatter measurements were made on the actual mirrors and witness samples using a (mu) Scan TM.

More about mirror cleaning. Beyond mirror cleaning Eventually the coating will become dull even with the best of care. It may take ten years or longer before the average person can notice a loss in the image. Salty or acid air will deteriorate the coating sooner. The mirror will then need to be recoated.

It's mm in diameter and the telescope was built in Stockholm in according to a brass plaque on its mount. I have attached a picture of the corrosion. It's a little hard to tell what you're looking at since it's a mirror but you can see it contrasted on the white background (off white, but center image) of a support strut.

Snow cleaning is done to remove the dust on the mirrors. The slow flow of snowflakes pickup the dust and falls down from the mirror.

If you use a high pressure you might damage the mirror when hard snowflakes bounce against the soft aluminium and cause pits in the mirror coating.

Mirror manufacturing began eight years ago with blanks made out of beryllium, an extremely hard metal that holds its shape in the extreme cold of space where the telescope will orbit. Mirror coating began in June Several of the smaller mirrors in the telescope, the tertiary mirror and the fine steering mirror, were coated in   Get this from a library.

The three Galileos: the man, the spacecraft, the telescope: proceedings of the conference held in Padova, Italy on January[Cesare Barbieri;]. Chemically and thermally stable ceramics are required for many applications. Many characteristics (electrochemical stability, high thermomechanical properties, etc.) directly or indirectly imply the use of refractory materials.

Many devices require the association of different materials with variable melting/decomposition temperatures, which requires their co-firing at a common temperature.

Cleaning the mirror's surface, the most critical step in evaporative coatings. I've tried a lot of other methods until I found this one based on various Research grade telescope re-coating. If you are cleaning a refractor or SCT you will be primarily cleaning your objective lens or front corrector plate, do add the alcohol in step 3.

On occasion, SCT and other catadioptric telescope owners will want clean their primary or secondary mirrors, these are usually aluminized as well. It may simply be a matter of cleaning the mirror. (And even cleaning isn't often necessary.

Dust on the mirror surface has little effect.) If there are marks on the mirror surface that won't come off or transparent spots, then the mirror may need re-coating. So here are excerpts from some of the opinions about coatings.

Issue #46 of Telescope. Optic Wave Labs offers the services of its in-house coating facility to the public. We provide standard aluminum, semi-enhanced aluminum, enhanced aluminum, gold and silver coatings. Our automated deposition system can accommodate telescope mirrors up to 22 inches in diameter.

We coat new mirrors as well as re-coat your existing mirror.Performance of the VLT Mirror Coating Unit E. ETTLINGER (LINDE), P. GIORDANO and M. SCHNEERMANN (ESO) In August ESO signed a contract with LINDE AG to supply the coating unit for the mirrors of the Very Large Telescope.

The coating unit was first erected and tested in Germany and then disassembled, packed and shipped to Chile.The University of California Observatories Astronomical Coatings Lab has undertaken development of protected silver coatings suitable for telescope mirrors that maintain high reflectivity at.