GB1341285A - Methods of producing optical elements - Google Patents

Methods of producing optical elements

Info

Publication number
GB1341285A
GB1341285A GB2084671A GB2084671A GB1341285A GB 1341285 A GB1341285 A GB 1341285A GB 2084671 A GB2084671 A GB 2084671A GB 2084671 A GB2084671 A GB 2084671A GB 1341285 A GB1341285 A GB 1341285A
Authority
GB
United Kingdom
Prior art keywords
faces
recesses
face
optical
machining
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.)
Expired
Application number
GB2084671A
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.)
Defense National France
Original Assignee
Defense National France
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 Defense National France filed Critical Defense National France
Publication of GB1341285A publication Critical patent/GB1341285A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/10—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0018—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for plane optical surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors

Abstract

1341285 Ultrasonic machining FRANCE ARMED FORCES MINISTER OF 19 April 1971 [28 Jan 1970 7 Jan 1971] 20846/71 Heading B3D A method of lightening an optical element of a material of very high hardness having at least one optical face of high reflecting power comprises forming recesses subjacent to the optical face by ultrasonic machining. The element may have two parallel faces, one of which is polished using cerium oxide to have a high reflecting power and the other of which has hexagonal recesses 3, Fig. 4, formed therein by ultrasonic machining, the recesses being to a distance of 1 mm. from the finished face and forming webs 4 of 0À5 to 1 mm. thick. The finished face is coated by evaporation of aluminium in vacuo at high temperature. In another embodiment, both faces 1a, 1b, Fig. 5, of the blank are reflecting faces and recesses 3<SP>1</SP> are formed in the lateral faces of the blank. In a further embodiment, the element is formed as a prism having three optical faces, one face having maximum reflections in the yellow, one treated for infra-red and the last for ultra-violet. Recesses 7, Fig. 6 are machined in the end faces 6d, 6e. The material of the element may be glass, quartz, fluorite, synthetic ruby, white sapphire, ceramic or other material of a hardness exceeding 50 Rockwell C units. The ultrasonic apparatus consists of a magnetostrictor 9 which converts an A.C. supply 8 to acoustic vibrations of a frequency above or equal to 20,000 C/S. The vibrations are amplified by a cone 10 and transmitted to a tool 11. The tool may be of steel or titanium and has a total length of about 120 mm. and a constricted portion about 60 mm. long. The magnetostrictor is carried by a support 12 which is vertically movable along a slideway 13 and connected to a wire 15 which runs over a pulley 16 and is joined to a counterweight 14. A control lever 17 is secured to the pulley and has an adjustable weight 18 for controlling the machining pressure. A tank 20 (Fig. 7, not shown) is mounted on the worktable 19 and has flanges (21) for mounting the element to be machined. A suspension of abrasive, such as a mixture of boron carbide, water, alcohol and a wetting agent, is supplied through nozzles (22).
GB2084671A 1971-01-07 1971-04-19 Methods of producing optical elements Expired GB1341285A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7100278A FR2120512A6 (en) 1971-01-07 1971-01-07

Publications (1)

Publication Number Publication Date
GB1341285A true GB1341285A (en) 1973-12-19

Family

ID=9069891

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2084671A Expired GB1341285A (en) 1971-01-07 1971-04-19 Methods of producing optical elements

Country Status (2)

Country Link
FR (1) FR2120512A6 (en)
GB (1) GB1341285A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103213037A (en) * 2013-04-24 2013-07-24 常熟市研明电子元器件厂 Deburring vibration grinding net
CN103213036A (en) * 2013-04-24 2013-07-24 常熟市研明电子元器件厂 Motor shocking grinding device
CN105382674A (en) * 2013-11-27 2016-03-09 天广消防股份有限公司 Surface treatment process of aluminum product workpiece

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1139662A (en) * 1955-04-27 1957-07-03 Wenczler & Heidenhain Patentve Fabrication of reticles and reticular networks using ultrasound
FR1268097A (en) * 1960-09-21 1961-07-28 Heraeus Schott Quarzschmelze High precision mirror with high surface consistency, in particular a large mirror
DE1472126B1 (en) * 1965-05-21 1969-09-04 Heraeus Schott Quarzschmelze Lightweight mirror
DE1259118B (en) * 1965-09-23 1968-01-18 Heraeus Schott Quarzschmelze Optical window with high light transmission for containers, pressure vessels and simulation chambers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103213037A (en) * 2013-04-24 2013-07-24 常熟市研明电子元器件厂 Deburring vibration grinding net
CN103213036A (en) * 2013-04-24 2013-07-24 常熟市研明电子元器件厂 Motor shocking grinding device
CN103213036B (en) * 2013-04-24 2015-04-15 常熟市研明电子元器件厂 Motor shocking grinding device
CN105382674A (en) * 2013-11-27 2016-03-09 天广消防股份有限公司 Surface treatment process of aluminum product workpiece

Also Published As

Publication number Publication date
FR2120512A6 (en) 1972-08-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee