Abstract: A double-pass fiber-optic based spectroscopic gas sensor delivers Raman excitation light and infrared light to a hollow structure, such as a hollow fiber waveguide, that contains a gas sample of interest. A retro-reflector is placed at the end of this hollow structure to send the light back through the waveguide where the light is detected at the same end as the light source. This double pass retro reflector design increases the interaction path length of the light and the gas sample, and also reduces the form factor of the hollow structure.

Abstract: A double-pass fiber-optic based spectroscopic gas sensor delivers Raman excitation light and infrared light to a hollow structure, such as a hollow fiber waveguide, that contains a gas sample of interest. A retro-reflector is placed at the end of this hollow structure to send the light back through the waveguide where the light is detected at the same end as the light source. This double pass retro reflector design increases the interaction path length of the light and the gas sample, and also reduces the form factor of the hollow structure.

Abstract: A dually adjustable back release archery device that enables a party utilizing the device to vary the configuration of the release in an infinite variety of ways within a designated range. A hook member is adjustably connected to a cam device having a generally smooth half mooned shaped surface that is configured for engagement with a generally flat topped pin that can be alternatively engaged and released so as to allow a desired adjustment of the hook and the cam to be obtained. The device further contains an adjustment between the hook and the cam provided by a set screw and a spring loaded ball that maintain the hook and cam in combination and allow the hook and cam to be fine adjusted according to the necessities of the user.

Abstract: An archery bowstring release includes a hand grip having a forwardly extending post pivotally mounting a bowstring hook member releasably engaged by a locking mechanism that serves to adjust the position of the hook on the hook member for releasing a bowstring and projecting an arrow to a target. In one embodiment, the hook member is secured adjustably to the post. In another embodiment, the hook member is mounted pivotally on a support frame carried pivotally on a cam member pivoted to the post and arranged to engage the hook member for release by pivotal movement of the support frame through a small angle by adjustment of the cam member rotationally relative to the post. The hook member may be secured adjustably to the post or cam member either by a pin and groove assembly or by a worm gear engaging a gear on the hook or cam member.

Abstract: A dually adjustable back release archery device that enables a party utilizing the device to vary the configuration of the release in an infinite variety of ways within a designated range. A hook member is adjustably connected to a cam device having a generally smooth half mooned shaped surface that is configured for engagement with a generally flat topped pin that can be alternatively engaged and released so as to allow a desired adjustment of the hook and the cam to be obtained. The device further contains an adjustment between the hook and the cam provided by a set screw and a spring loaded ball that maintain the hook and cam in combination and allow the hook and cam to be fine adjusted according to the necessities of the user.

Abstract: An archery bowstring release includes a hand grip having a forwardly extending post pivotally mounting a bowstring hook member releasably engaged by a locking mechanism that serves to adjust the position of the hook on the hook member for releasing a bowstring and projecting an arrow to a target. In one embodiment, the hook member is secured adjustably to the post to adjust the angle of the hook for various degrees of sensitivity of bowstring release. In another embodiment, the hook member is mounted pivotally on a support frame carried pivotally on a cam member pivoted to the post and arranged to engage the hook member for release by pivotal movement of the support frame through a small angle that is adjustable by adjustment of the cam member rotationally relative to the post.