摘要:
The oscillator comprises two resonant cavities in which a non-linear crystal (3) is situated. The incident pumping radiation Rpe follows an emitting path across the crystal, the generated signal and complementary radiation carry out numerous emitted and return paths in the cavities, hence across the crystal and are thus converted into an inverse pumping radiation on the return paths thereof. According to the invention, a device (4) is incorporated in the oscillator for reflection of a fraction of the pumping radiation equivalent to the inverse pumping radiation in the absence of the device.
摘要:
The oscillator comprises two resonant cavities in which a non-linear crystal (3) is situated. The incident pumping radiation Rpe follows an emitting path across the crystal, the generated signal and complementary radiation carry out numerous emitted and return paths in the cavities, hence across the crystal and are thus converted into an inverse pumping radiation on the return paths thereof. According to the invention, a device (4) is incorporated in the oscillator for reflection of a fraction of the pumping radiation equivalent to the inverse pumping radiation in the absence of the device.
摘要:
The invention applies to doubly resonant optical parametric oscillators comprising a non-linear crystal (4) through which pass a pump laser beam (fp), a signal beam (fs), and a complementary beam (fc), and a device (5) that totally or partially reflects said beams emanating from the crystal such that, after reflection, they generate between them a relative phase-shifting value ΔΦar for a given functioning mode independent of the signal frequency or complementary frequency, and is characterized in that the reflecting device (5) is a metallic minor, or a combination of two scattering mirrors and a multilayer dielectric mirror placed downstream.
摘要:
An engine mount for a vehicle, such as a snowmobile, that can be used when space for the engine within a chassis is limited and which is easily accessed from the side of the chassis for assembly and repair. The engine mount can be attached to the bottom of an engine that is positioned within a chassis. The engine mount can include four hollow, cylindrical portions. Each cylindrical portion having an axis extending transverse to the longitudinal direction of the snowmobile chassis and receiving a damping mount. Fasteners can be inserted through the chassis to couple with the damping mounts and cylindrical portions in a direction that is transverse to the longitudinal direction of the chassis. The configuration of the damping mounts permits effective damping especially in a direction transverse to the direction of forward travel of the vehicle.
摘要:
A core for a protective leg gear includes a rear pad and a front pad. The rear pad is integrally molded in a single mold from a semi-rigid lightweight material, and has a leg portion and a foot portion integrally connected to each other at an angle with respect to one another to define a rear surface of the rear pad. The rear surface includes an elongated groove configured to at least partially receive a lower part of the leg. The front pad is connected to at least part of a front surface of the rear pad. The upper portion of the front pad extends beyond the leg portion to cover the knee. The front pad is more flexible than the rear pad, such as to allow at least limited rearward folding of the upper portion of the front pad.
摘要:
A side panel for a recreational vehicle, such as a snowmobile is disclosed. The side panel extends from the windshield portion of the snowmobile to the pan portion. The side panel is hingedly attached at a front edge to the snowmobile so that the side panel opens outwardly along vertically oriented hinges. The side panel includes a windshield to protect the operator's legs. The side panel also includes an airbox which provides an air charge to the engine for combustion. In addition, an airbox, divisible into two parts is also disclosed. The airbox includes a portion adapted to be attached to the interior of the side panel or to a belt guard. A second portion of the air box can be disposed within the engine compartment.
摘要:
A wheel balancing weight attached to the rim of a wheel for balancing the wheel is disclosed. The wheel balancing weight comprises a weight mass manufactured from zinc composite or a zinc based material and a means for attaching said weight mass to the rim. The zinc composite or zinc based material wheel balancing weight exhibits physical characteristics in terms of corrosion resistance and ductility comparable to those of traditional lead alloy wheel balancing weights while at the same time providing an environmentally friendly alternative to lead.
摘要:
An engine mount for a vehicle, such as a snowmobile, that can be used when space for the engine within a chassis is limited and which is easily accessed from the side of the chassis for assembly and repair. The engine mount can be attached to the bottom of an engine that is positioned within a chassis. The engine mount can include four hollow, cylindrical portions. Each cylindrical portion having an axis extending transverse to the longitudinal direction of the snowmobile chassis and receiving a damping mount. Fasteners can be inserted through the chassis to couple with the damping mounts and cylindrical portions in a direction that is transverse to the longitudinal direction of the chassis. The configuration of the damping mounts permits effective damping especially in a direction transverse to the direction of forward travel of the vehicle.
摘要:
An engine mount for a vehicle, such as a snowmobile, that can be used when space for the engine within a chassis is limited and which is easily accessed from the side of the chassis for assembly and repair. The engine mount can be attached to the bottom of an engine that is positioned within a chassis. The engine mount can include four hollow, cylindrical portions. Each cylindrical portion having an axis extending transverse to the longitudinal direction of the snowmobile chassis and receiving a damping mount. Fasteners can be inserted through the chassis to couple with the damping mounts and cylindrical portions in a direction that is transverse to the longitudinal direction of the chassis. The configuration of the damping mounts permits effective damping especially in a direction transverse to the direction of forward travel of the vehicle.
摘要:
A cooking assembly for a cooker or a cooking top and comprises a cooking plate (1) and at least one heat generator (200) enabling a receptacle to be heated without coming directly into contact therewith. The cooking plate (1) includes an opening (4) associated with each heat generator (200) and enabling said generator to act directly, together with retractable closure means such as a moving plug (203) associated with each opening (4) to close said opening when the heat generator (200) is not in use, the moving plug (203) then being flush with the top surface (2) of the cooking plate (1), motorized means being provided for retracting said moving plug in order to unmask the heat generator so that it can be put into use. The invention is applicable to cooking assemblies for gas cookers and/or electric cookers having a cooking plate made of molded glass, of vitroceramic, or of agglomerated inorganic fibers.