Abstract: In the field of archery, draw length adjustment is currently accomplished by interchangeable cams or cam adjustment while the handgrip remains fixed. To accommodate for shorter draw lengths, smaller cams are used which can reduce arrow velocity and overall bow performance. The Great Equalizer is a riser system that can be incorporated into any archery bow design and consists of various fixed positions that utilizes a movable handgrip that can be locked in place at any of the positions to compensate for the bow user's draw length without having to adjust the cams that can inhibit a bow's performance.

Abstract: In the preferred embodiment, a monocrystalline film of substituted yttrium iron garnet (YIG) deposited on a <111> oriented gadolinium gallium garnet (GGG) substrate is formulated so that the temperature variation of the ferromagnetic resonance frequency of the film has an ordinary minimum. For a range of temperature variations about the temperature at which the minimum occurs, therefore, the resonance frequency of the film is relatively insensitive to variations in temperature. This minimum is believed to occur where the temperature variations of the demagnetizing effect and the temperature variations of anisotropy effects more or less counterbalance each other. The counterbalancing effects are brought within range of each other primarily by the substitution of gallium or aluminum for iron and the substitution of lanthanum for yttrium in the substituted YIG. Gallium or aluminum reduces the temperature drift of the saturation magnetization.

Abstract: In the preferred embodiment, a monocrystalline film of substituted yttrium iron garnet (YIG) deposited on a <11> oriented gadolinium gallium garnet (GGG) substrate is formulated so that the temperature variation of the ferromagnetic resonance frequency of the film has an ordinary minimum. For a range of temperature variations about the temperature at which the minimum occurs, therefore, the resonance frequency of the film is relatively insensitive to variations in temperature. This minimum is believed to occur where the temperature variations of the demagnetizing effect and the temperature variations of anisotropy effects more or less counterbalance each other. The counter-balancing effects are brought within range of each other primarily by the substitution of gallium or aluminum for iron and substitution of lanthanum for yttrium in the substituted YIG. Gallium or aluminum reduces the temperature drift of the saturation magnetization. Lanthanum adjusts the misfit stress and thus the anisotropy effects.

Abstract: A ring laser having a Faraday cell for biasing the mode locking region beyond the range of rotation rates of interest. The Faraday element included in the cell is a composite comprising a monocrystalline thin film of a ferrimagnetic material epitaxially deposited on a non-magnetic single crystal substrate. An antireflection coating on the composite reduces reflections. Reflections are further reduced by the selection of thickness and index of refraction for the layers of the composite. Selected substituents are used in garnet layers to achieve desired magnetic properties, desired indices of refraction, and desired matching of the lattice parameter from layer to layer to minimize internal stresses. Where a composite is provided with a reflection coating on one side thereof, it is adapted to serve as an optical cavity forming corner reflector.

Abstract: A ring laser having a nonreciprocal loss element positioned in the aperture of the optical cavity of the laser. The nonreciprocal loss element is adapted to isolate a pair of plane-polarized counter-propagating light waves from each other. The isolation reduces the coupling between the waves and thereby reduces the extent of nonlinear mode locking which typically occurs in ring laser gyroscopes when the difference in frequency between the light in the two waves is small. The isolation is the result of either a spatial or a temporal separation between the counter-propagating light waves. The nonreciprocal loss element of the preferred embodiments comprises a first optical element having reciprocal optical activity and a second optical element having either reversed or reversible nonreciprocal optical activity.

Abstract: A multilayer dielectric mirror wherein the mirror substrate is of garnet. Chemical-mechanical final polishing of the substrate provides a surface relatively free of inhomogeneous strain for the deposition thereon of relatively homogeneous individual layers for a multilayer dielectric mirror coating.

Abstract: Mode conversion of optical signals in thin film optical devices is obtained in a region of Faraday effect magnetic material waveguide by providing a periodic structure in which alternate half cycles have the magnetization parallel to the propagation direction to turn on the Faraday effect to induce mode conversion and in which the intervening half cycles have the magnetization perpendicular to the propagation direction to turn off the Faraday effect to prevent mode conversion. Stripe domains are preferably used to turn the Faraday effect off. Non-reciprocal mode conversion is obtained by optically coupling an anisotropic crystal to the waveguide to provide a quantity of mode conversion equal to that provided by the Faraday effect.

Abstract: A bubble domain composite for suppressing the formation of hard bubble domains comprises a magnetic garnet bubble domain layer, a non-magnetic substrate for supporting the bubble domain layer, and a magnetic hard bubble suppression layer that may be (1) grown on the substrate between the bubble domain layer and the supporting substrate or (2) grown directly on the bubble domain layer, which itself is grown on the substrate.

Abstract: Normal single wall magnetic or "bubble" domains are generated in bubble domain materials without generating hard bubble domains by selecting the composition based upon a predetermined minimum temperature. This hard bubble suppression is based upon the fact that a bubble domain material of a given composition has a characteristic temperature, T.sub.H, above which hard bubble domains are not generated. By selecting the composition to set T.sub.H equal to or less than the minimum ambient temperature for the bubble domain material, hard bubble generation is precluded. Means may be provided for maintaining the bubble domain material at or above T.sub.H.