Abstract:
In order to provide a uniform angular response and increased sensitivity over a wide field of view the present optical spectral filter (8) makes use of a piano-concave optical entrance element (10), one or more concavo-convex interior elements (12 to 16) and a piano-convex exit element (18) with the curvatures of all elements having the same center (50).
Abstract:
A compact pulsed optical source of near to ultraviolet wavelength energy adapted to be connected to an external power source (55) includes a device (20) for emitting photons, apparatus (30) for transforming photons into photoelectrons, apparatus (40) for multiplying the photoelectrons, a lens (90), a phosphor coated anode (70), circuit apparatus (100) for providing a pulsed electric signal and first (50) and second (60) biasing apparatus. The emitting device (20) impinges photons on the photon transforming apparatus (30) which accelerates electrons to the multiplying apparatus (40) as pulses are received from the circuit apparatus which relates the multiplying apparatus to the transforming apparatus. With each pulse, a cloud of electrons (42) is emitted from the multiplying apparatus (40) and excites the phosphor coated anode (70) thereby causing optical emission.
Abstract:
A compact pulsed optical source of near to ultraviolet wavelength energy adapted to be connected to an external power source (55) includes a device (20) for emitting photons, apparatus (30) for transforming photons into photoelectrons, apparatus (40) for multiplying the photoelectrons, a lens (90), a phosphor coated anode (70), circuit apparatus (100) for providing a pulsed electric signal and first (50) and second (60) biasing apparatus. The emitting device (20) impinges photons on the photon transforming apparatus (30) which accelerates electrons to the multiplying apparatus (40) as pulses are received from the circuit apparatus which relates the multiplying apparatus to the transforming apparatus. With each pulse, a cloud of electrons (42) is emitted from the multiplying apparatus (40) and excites the phosphor coated anode (70) thereby causing optical emission.