SU24150A1 - Light meter - Google Patents

Description

The invention / relates to luxmeters, which illuminate onpeAejvfleTCfl not by changing the illumination of a white surface placed at the place of work to be examined, but by measuring the illumination of the surface of a glass inserted into a luxmeter.

In FIG. 1 shows a luxmeter in vertical section; FIG. 2 is a side view of a light meter; FIG. 3 lux in horizontal section on. level of the lower part of the photometric camera; FIG. 4 - the same at the level of the upper part of the chamber; FIG. 5 is a transverse section in the plane of the slots.

The proposed light meter consists of two glasses MI and L / g serving as photometric surfaces and placed in a photometric camera equipped with a handle P. Glass MI is illuminated by the test surface through a Tob tube with an aim h, and glass by an MZ reference light source through a tube T, For comparing the illumination of the pointing surfaces through the ocular tube. Current with diaphragm. A reflecting mirror 3 and KI slots and 21 whose width is varied using micrometer screws mounted on the axes. We placed a graduated measuring disk And, equipped with indicators of the Criminal Code.

The subject matter of the invention.

1. A light meter, characterized by the use of two -3f, L / o glasses located in a photometric chamber, serving as photometric surfaces, of which glass 3 / is illuminated through the Tob objective tube of the surface being examined for illumination, and the glass M is illuminated with a reference light source through tube T, to compare the illumination of which surfaces through the ocular tube. The current is applied to a variable slit width D and K and a reflecting mirror 3.

1. In the light meter described in paragraph 1, the use of micrometer screws fixed on the axles, which change the width of the gaps K and K, CC markers, moved against the graduated дел, Y copyright certificate K. No. 24150 I. Tsikylekko

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