free-space

free-space

Refers to natural viewing conditions, that is viewing an object that is neither housed inside an instrument, (e.g. in a synoptophore), nor viewed through an optical system. Syn. open environment; true-space.
References in periodicals archive ?
In the free-space contract system, [[PI].sub.2](s) is concave if Assumption 5 and the following assumption are satisfied.
where ([+ or -][e.sub.*]) and [mc.sup.2] are the charge and rest mass energy of the free-space Dirac particles and (-[e.sub.*]) refers to the separate Planck particles making up the PV continuum.
Combining free-space optical technology with networking technology and refined optical links enables wireless optical networking.
R = free-space, LOS distance from the transmitter to the receiver
The free-space vacuum state is not empty, but as Davies puts it, "[this living vacuum] holds the key to a full understanding of the forces of nature" [6, p.104].
DAOU's solution was to have AstroTerra's TerraLink 4-155 free-space laser communication system installed, connecting the two AHS buildings at a distance of 500 meters.
Chapter 2 begins with the basic concepts of propagation and free-space EM radiation.
The laser was developed as part of the firm's silicon photonics platform and designed for integration alongside other specifically developed native components, such as modulators, SOAs (semiconductor optical amplifiers), multiplexors, detectors, VOAs and low-loss fibre and free-space interfaces, among others, for highly integrated solutions.
The company recently announced an industry-first agreement with NASA to develop a commercialized free-space optical communication system that could support the agency's future missions.