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1. WO2009045572 - OPTICAL ELEMENT MOUNT AND METHOD THEREOF FOR A GUN-LAUNCHED PROJECTILE

Publication Number WO/2009/045572
Publication Date 09.04.2009
International Application No. PCT/US2008/065794
International Filing Date 04.06.2008
IPC
F41G 7/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
41WEAPONS
GWEAPON SIGHTS; AIMING
7Direction control systems for self-propelled missiles
F41G 9/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
41WEAPONS
GWEAPON SIGHTS; AIMING
9Systems for controlling missiles or projectiles, not provided for elsewhere
F42B 10/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
42AMMUNITION; BLASTING
BEXPLOSIVE CHARGES, e.g. FOR BLASTING; FIREWORKS; AMMUNITION
10Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
F42B 15/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
42AMMUNITION; BLASTING
BEXPLOSIVE CHARGES, e.g. FOR BLASTING; FIREWORKS; AMMUNITION
15Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
H01Q 1/42 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
1Details of, or arrangements associated with, antennas
42Housings not intimately mechanically associated with radiating elements, e.g. radome
H01Q 1/40 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
1Details of, or arrangements associated with, antennas
40Radiating elements coated with, or embedded in, protective material
CPC
F41G 7/2253
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
41WEAPONS
GWEAPON SIGHTS; AIMING
7Direction control systems for self-propelled missiles
20based on continuous observation of target position
22Homing guidance systems
2253Passive homing systems, i.e. comprising a receiver and do not requiring an active illumination of the target
F41G 7/226
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
41WEAPONS
GWEAPON SIGHTS; AIMING
7Direction control systems for self-propelled missiles
20based on continuous observation of target position
22Homing guidance systems
226Semi-active homing systems, i.e. comprising a receiver and involving auxiliary illuminating means, e.g. using auxiliary guiding missiles
F41G 7/2293
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
41WEAPONS
GWEAPON SIGHTS; AIMING
7Direction control systems for self-propelled missiles
20based on continuous observation of target position
22Homing guidance systems
2273characterised by the type of waves
2293using electromagnetic waves other than radio waves
F42B 30/006
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
42AMMUNITION; BLASTING
BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
30Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
006Mounting of sensors, antennas or target trackers on projectiles
G02B 7/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
7Mountings, adjusting means, or light-tight connections, for optical elements
G02B 7/007
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
7Mountings, adjusting means, or light-tight connections, for optical elements
007Pressure-resistant sight glasses
Applicants
  • RAYTHEON COMPANY [US]/[US] (AllExceptUS)
  • JOHNSON, Gary, H. [US]/[US] (UsOnly)
  • BEARD, Douglas, M. [US]/[US] (UsOnly)
  • THOMAS, John, A. [US]/[US] (UsOnly)
  • PEREZ, Rene, D. [US]/[US] (UsOnly)
Inventors
  • JOHNSON, Gary, H.
  • BEARD, Douglas, M.
  • THOMAS, John, A.
  • PEREZ, Rene, D.
Agents
  • GIFFORD, Eric, A.
Priority Data
11/761,15511.06.2007US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL ELEMENT MOUNT AND METHOD THEREOF FOR A GUN-LAUNCHED PROJECTILE
(FR) MONTAGE D'ÉLÉMENT OPTIQUE ET PROCÉDÉ ASSOCIÉ POUR UN PROJECTILE TIRÉ PAR UN CANON
Abstract
(EN)
An optical element mount is effective in high G environments to protect brittle optical elements in which tensile stresses are generated on surface S2 without degrading optical performance. A flexible spacer formed of a relatively low-stiffness material supports an optical element having a tapered outer periphery in an optical seat having a complementary tapered surface. When the optical assembly is exposed to the high G environment, the inertial loading drives the optical element in the aft direction into the flexible spacer and seat. This puts the optical element into a plate bending condition thereby inducing tensile stress on S2 which is at least partially offset by a compressive stress caused by the reaction force normal to the tapered interface. The stresses, both compressive and tensile, placed on the optical element in the high G environment can be very large. In the absence of the tapered mount and flexible spacer, the tensile stress placed on S2 would likely fracture or shatter the brittle optical element. When the inertial loading is removed, the optical element returns to its initial unstressed position.
(FR)
L'invention concerne un montage d'élément optique efficace dans des environnements à accélération g élevée pour protéger des éléments optiques fragiles dans lesquels des contraintes de traction sont générées sur une surface S2 sans dégrader les performances optiques. Un espaceur souple constitué d'un matériau à rigidité relativement faible supporte un élément optique présentant une périphérie extérieure conique reçue dans un siège optique présentant une surface conique complémentaire. Lorsque l'ensemble optique est exposé à l'environnement à accélération g élevée, la charge inertielle entraîne l'élément optique en arrière dans l'espaceur souple et le siège. Ceci amène l'élément optique dans un état de cintrage de plaque, induisant ainsi une contrainte de traction sur S2 qui est au moins partiellement compensée par une contrainte de compression causée par la force de réaction perpendiculaire à l'interface conique. Les contraintes, de compression et de traction, appliquées sur l'élément optique dans l'environnement à accélération g élevée peuvent être très importantes. En l'absence du montage conique et d'un espaceur souple, la contrainte de traction appliquée sur S2 fracturerait ou briserait l'élément optique fragile. Lorsque la charge inertielle est supprimée, l'élément optique retourne dans sa position non contrainte initiale.
Also published as
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