Robert W Fish

US Patent:

7145703, Dec 5, 2006

Filed:

Jan 27, 2005

Appl. No.:

11/044799

Inventors:

Eric J. Sieczka - Ann Arbor MI, US
Anthony M. Tai - Northville MI, US
Robert H. Fish - Howell MI, US

Assignee:

EOTech Acquisition Corp. - Ann Arbor MI

International Classification:

G02B 5/32

US Classification:

359 15, 42130, 42131, 42132, 356247

Abstract:

A low profile holographic sight includes a base having a mounting mechanism and a body mounted on the base for housing a laser diode, an associated electronic control and power source, and optical elements including a collimator, a transmission image hologram of the reticle pattern, and a reflective diffraction grating, wherein the optical elements are arranged within the body to direct and fold the laser beam in a substantially generally horizontal path, and is insensitive to drift in laser wavelength. The optical elements superimpose an image of the reticle pattern over the direct view of the target scene in a generally parallel and close relationship with the barrel of a firearm, such as a shotgun or a rifle, upon which the sight is mounted.

US Patent:

20160161735, Jun 9, 2016

Filed:

Jul 7, 2014

Appl. No.:

14/903537

Inventors:

- Livonia MI, US
Joseph Anthony Brincat - Livonia MI, US
Robert H. Fish - Livonia MI, US
Paul Karatsinides - Livonia MI, US
Kenneth M. Junkins - Livonia MI, US

International Classification:

G02B 23/14
G02B 27/20
F41G 1/34
G02B 17/02
G02B 19/00
G02B 5/32
G02B 27/00

Abstract:

A lightweight holographic sighting system is provided that is designed to minimize optical aberrations common with earlier holographic sighting systems. The system has a modular construction that is more economic and conducive to high volume production, in terms of complexity of required fixturing and availability of materials, than earlier systems. The system is lighter and more compact, while providing a larger field of view than existing systems, and can be used on small hand guns, standard size firearms, bows, telescopes, and other devices without adding significant weight or space constraints. The system utilizes an upper housing assembly containing a high efficiency holographic optical element, an anti-reflective glass viewing window, and a red diode laser light source driven by a high efficiency microcontroller circuit designed for increased battery life, and a lower housing assembly containing two dielectric folding mirrors, an on-axis collimating lens, and a high efficiency achromatizing holographic optical element.