GOLDEN SCAN 3 - MIRROR UNIT

Clay Paky's long standing mechanical design expertise and Pulsar's unparalleled control electronics know-how, both accumulated in the professional show-lighting sector, have enabled us to develop the ultimate in microstepping motor technology. As a results, the Golden Scan 3 light beam can be positioned with exceptional accuracy, total control and no speed or excursion limits.

The moving mirror is highly reflective, reducing the loss of light output efficacy to negligible values.


Its perfectly flat surface is very large to ensure it reflects the entire light beam projected by the luminire, even when the Frost filter and prism are inserted and irrespective of wheter the wide-angle lens is used or not. The mirror is moved by two microstepping motors with a pan movement of 150° and a tilt movement of 110°. The possibilities of positioning the light beam in relation to the scene are increased still further by the possibility of easily rotating the mirror head through 360° on the luminaire body. Completing this flexibility, the Golden Scan 3 features a device for reversing the movement of the mirror. This makes it possible to switch straight from symmetrical to asymmetrical movements, in conjunction with other lights, without the need for time-consuming changes to their control programs. Thanks to all these devices, the Golden Scan 3's installation, centering and programming operations are fairly simple to carry out, above all in touring applications, since the movement of the mirror is virtually independent from its position on the luminaire body.
The speed at which the mirror moves can be selected as desired from a wide range of values, extending from an infinitesimal minimum value to a maximum pan value of 0.4 s/150° and a maximum tilt value of 0.3 s/110°. The most surprising aspect of the Golden Scan 3's performance, however, is its smooth, even movement, which is particularly noticeable at low speeds. The effective mirror rotation resolution is thus 0.6° for the pan action (150°/256) and 0.4° for the tilt action (110°/256). Thanks to this, in the worst case, the light beam could be 0,3° or 0,2° from the required position for pan and tilt respectively. A sophisticated algorithm in the control software developed by Pulsar has in fact made it possible to double the microstepping resolution.

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