FR2161799A1 - Astronomical mirror - of light weight using hollow glass tubes as structural support - Google Patents

Astronomical mirror - of light weight using hollow glass tubes as structural support

Info

Publication number
FR2161799A1
FR2161799A1 FR7142858A FR7142858A FR2161799A1 FR 2161799 A1 FR2161799 A1 FR 2161799A1 FR 7142858 A FR7142858 A FR 7142858A FR 7142858 A FR7142858 A FR 7142858A FR 2161799 A1 FR2161799 A1 FR 2161799A1
Authority
FR
France
Prior art keywords
tubes
hollow glass
light weight
structural support
glass tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7142858A
Other languages
French (fr)
Other versions
FR2161799B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VASSEUR MAXIME
Original Assignee
VASSEUR MAXIME
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VASSEUR MAXIME filed Critical VASSEUR MAXIME
Priority to FR7142858A priority Critical patent/FR2161799A1/en
Publication of FR2161799A1 publication Critical patent/FR2161799A1/en
Application granted granted Critical
Publication of FR2161799B1 publication Critical patent/FR2161799B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C03B23/207—Uniting glass rods, glass tubes, or hollow glassware
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Telescopes (AREA)

Abstract

Hollow glass sealed end tubes of low coefft. of thermal expansion are placed parallel and in contact with each other between glass end plates and clamped in a moulding frame between graphite moulding face plates, the mould is evacuated and heated until the glass softens, so that the tubes expand under the pressure of air inside the tubes against each other, welding themselves together to form hexagonal tubes, and welding to the end plates to form a strong lightweight structure after cooling. The assembly is cooled slowly through the annealing range.
FR7142858A 1971-11-30 1971-11-30 Astronomical mirror - of light weight using hollow glass tubes as structural support Granted FR2161799A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7142858A FR2161799A1 (en) 1971-11-30 1971-11-30 Astronomical mirror - of light weight using hollow glass tubes as structural support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7142858A FR2161799A1 (en) 1971-11-30 1971-11-30 Astronomical mirror - of light weight using hollow glass tubes as structural support

Publications (2)

Publication Number Publication Date
FR2161799A1 true FR2161799A1 (en) 1973-07-13
FR2161799B1 FR2161799B1 (en) 1975-04-18

Family

ID=9086638

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7142858A Granted FR2161799A1 (en) 1971-11-30 1971-11-30 Astronomical mirror - of light weight using hollow glass tubes as structural support

Country Status (1)

Country Link
FR (1) FR2161799A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466700A (en) * 1980-05-16 1984-08-21 Heraeus Quarzschmelze Gmbh Lightweight mirror especially for astronomical purposes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1268097A (en) * 1960-09-21 1961-07-28 Heraeus Schott Quarzschmelze High precision mirror with high surface consistency, in particular a large mirror

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1268097A (en) * 1960-09-21 1961-07-28 Heraeus Schott Quarzschmelze High precision mirror with high surface consistency, in particular a large mirror

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466700A (en) * 1980-05-16 1984-08-21 Heraeus Quarzschmelze Gmbh Lightweight mirror especially for astronomical purposes

Also Published As

Publication number Publication date
FR2161799B1 (en) 1975-04-18

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