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The introduction of Prescolite’s VirtualSource optics has fundamentally changed the way that optical performance is measured and observed. VirtualSource represents a unique approach to reflector design. Once explained, it is easily understood. However, an underlying set of complex geometric principals is the key to an optical design that is unparalleled in the industry.
The introduction of Prescolite’s VirtualSource optics has fundamentally changed the way that optical performance is measured and observed. VirtualSource represents a unique approach to reflector design. Once explained, it is easily understood. However, an underlying set of complex geometric principals is the key to an optical design that is unparalleled in the industry.
Prescolite’s VirtualSource Optical Design resulted in symmetrical cutoff, efficiency, appearance consistency, sharp cutoff, low luminance, and high VCP (visual comfort probability values).
Figure 1 |
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NON-PRESCOLITE = VISUAL NOISE |
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The promise:
Parallel cutoff (between the optical and physical cutoff). |
The reason it is impossible:
The horizontally mounted compact fluorescent lamp is asymmetrical.
When the optical cutoff reflects light out of the reflector at angles higher
than the physical cutoff, side angle glare is created. |
The typical result:
So-called “bunny’s teeth,” odd striations, or bright spots are visible on the side of the reflector. An active lower reflector (intentional or not) has uneven brightness that is apparent to the viewer. |
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Figure 2 |
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Figure 3 |
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Click the below links to download VirtualSource Spec Sheets |
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“VirtualSource reflectors exhibit a unique lamp image flow, which is the result of the first studied application of ergonomic design in downlighting. The passive lower reflector always fills logically and smoothly with light, at a rate constant to the viewer’s movement. The result is quiet, unobtrusive downlighting by design.”
—Prescolite Optical Designer
US Patent No. 5,918,969
