Planetary polirimetric optics positioning system in astronomical spectrograph

FIELD: physics.

SUBSTANCE: planetary mechanism comprises a photometer consisting of a disc (1), which is equipped with an axle (2), having openings that are equidistant from each other and from the centre of the disc, in which light filters are located. The axle (2) interacts with the disc through a free-wheel clutch (3). In the openings of the disc there are rotatable adapters (4), the outer surface of which is in form of gear wheels which interact with a central gear wheel (5), immovably mounted on the axle (2). The disc interacts with the base through another free-wheel clutch (7). Directions of the working strokes of the free-wheel clutches (3, 7) are opposite.

EFFECT: along with the possibility of moving the light filters, the invention enables to turn each of the light filters about its own axis.

1 dwg

 

The invention relates to the field of equipment used for astrophysical research, and can be used for the observation of the starry sky with a telescope.

Known mechanism photometer adopted for the prototype (see Apending. Automatic star electrophotometer Astrophysical laboratory of the Academy of Sciences of the Latvian SSR. Str-140)containing a disk with holes in it that have the filters supplied with the axis of which is connected to the actuator, in the form of an electric motor equipped with a reducer. The mechanism allows you to rotate the disk at a given angle, while on the path of the light flux of the telescope is one of the filters.

However, when the mechanism of the photometer can be installed polarizing filters having different bandwidth, the problem arises not only in the change of filters, but in turning any of them at a certain angle, which cannot be implemented in a known photometer.

The aim of the invention is, along with the ability to move itself filters the implementation of rotation of each of the filters around its axis.

This goal is achieved by the fact that in the planetary mechanism positioning polarimetric optics in astronomical spectrograph containing automatr, consisting of a disk provided with an axle, with holes in it, ravnovesie from each other and from the center of the disc where the light filters axis communicates with the drive through the overrunning clutch, the disc openings are located with the possibility of rotation of the mandrel, the outer surface of which is made in the form of gears that interact with the Central toothed wheel fixedly mounted on the axle, and the drive communicates with the base through another overrunning clutch, and direction of strokes overrunning the opposite.

The essence of the invention is illustrated graphics, where figure 1 shows a planetary gear positioning polarimetric optics in the context.

Planetary gear consists of a disk 1, rotating on the axis 2. In the disk 1 with holes spaced approximately equidistant from each other and from the center of the disc 1 and axis 2 interacts with the disk 1 by means of the overrunning clutch 3, the disc openings are located with the possibility of rotation of the mandrel 4, the outer surface of which is made in the form of gears that interact with the Central toothed wheel 5 is fixedly mounted on the axle 2. In addition, the disk 1 interacts with the housing of the stepping motor 6 by means of the overrunning clutch 7, and the direction of the strokes abhann the x couplings 3 and 7 opposite. In the holes of the mandrel 4 are polarizing filters 8. The parts and components of the planetary mechanism fastened to each other by means of screws with countersunk head.

The planetary mechanism works as follows. During the rotation axis 2 in the direction of the stroke overrunning clutch 3 and idling overrunning clutch 7 is the rotation of the disk 1, so you can install the necessary optical filter on the optical axis of photopolarimeter (figure 1 not shown), that is, any of the filter 8 can be moved into the working position. During the rotation axis 2 in the opposite direction, namely in the direction of the stroke overrunning clutch 7 and idling overrunning clutch 3, the position of the disc 1 is automatically fixed and rotates the Central gear 5, which rotates the mandrel 4 is fixed in them by the filters 8, around its axis each, allowing you to Orient the direction of their polarization planes.

The use of the inventive planetary mechanism allows not only to move the filters themselves, making their replacement, but also to rotate each about its own axis using only one reversible electric motor.

Planetary positioning mechanism polarimetric optics in astronomical spectrograph containing photometer consisting of a thesis is and, equipped with axis, with holes in it, ravnovesie from each other and from the center of the disc, which are filters, characterized in that the axis communicates with the drive through the overrunning clutch, the disc openings are located with the possibility of rotation of the mandrel, the outer surface of which is made in the form of gears that interact with the Central toothed wheel fixedly mounted on the axle, and the drive communicates with the base through another overrunning clutch, and direction of strokes overrunning the opposite.



 

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