Abstract: Handsfree fieldglasses providing increased clarity and magnification of a visual target in an outdoor application are disclosed. The handsfree fieldglasses can include eyeglasses, binoculars, and a customized connector coupling the eyeglasses and binoculars. The eyeglasses may include prescription lenses and/or polarized lenses. The lenses can have antireflective coatings, hydro-phobic coatings and/or a reduced or substantially flat base curve. The binoculars include adjustable separate lens arrangements having lengthy or infinite focal lengths to be placed against each eyeglass lens. The connector includes multiple fixed attachments and adjustable components such that the binoculars can be custom adjusted to rest against the eyeglasses and also to flip away from the eyeglasses while remaining coupled thereto. While resting against the eyeglasses, a user simultaneously perceives a full field of view having a magnified central portion and non-magnified outer portion.

Abstract: An improved system for compressing or expanding the dynamic range of an electrical input signal of the type which includes a variable gain device for controlling the gain of the input signal and a circuit for generating a control signal for the variable gain device including a rectifier for producing responsively to the input signal a DC signal which substantially follows dynamic variations of the input signal. The improvement resides in the provision in the control signal generating circuit of a network of at least three signal paths having a common input terminal connected to receive the DC signal and a common output terminal connected to the variable gain device for coupling a control signal thereto, which signal paths have differing time constants and are automatically selectable as a function of the rate and amount of change in amplitude of the DC signal.