Variable aperture collimator for high energy radiation
- Albuquerque, NM
An apparatus is disclosed providing a variable aperture energy beam collimator. A plurality of beam opaque blocks are in sliding interface edge contact to form a variable aperture. The blocks may be offset at the apex angle to provide a non-equilateral aperture. A plurality of collimator block assemblies may be employed for providing a channel defining a collimated beam. Adjacent assemblies are inverted front-to-back with respect to one another for preventing noncollimated energy from emerging from the apparatus. An adjustment mechanism comprises a cable attached to at least one block and a hand wheel mechanism for operating the cable. The blocks are supported by guide rods engaging slide brackets on the blocks. The guide rods are pivotally connected at each end to intermediate actuators supported on rotatable shafts to change the shape of the aperture. A divergent collimated beam may be obtained by adjusting the apertures of adjacent stages to be unequal.
- Research Organization:
- AT&T
- DOE Contract Number:
- AC04-76DPOO789
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4450578
- Application Number:
- 06/354,552
- OSTI ID:
- 865019
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
aperture
collimator
energy
radiation
apparatus
disclosed
providing
beam
plurality
opaque
blocks
sliding
interface
edge
contact
form
offset
apex
angle
provide
non-equilateral
block
assemblies
employed
channel
defining
collimated
adjacent
inverted
front-to-back
respect
preventing
noncollimated
emerging
adjustment
mechanism
comprises
cable
attached
hand
wheel
operating
supported
guide
rods
engaging
slide
brackets
pivotally
connected
intermediate
actuators
rotatable
shafts
change
shape
divergent
obtained
adjusting
apertures
stages
unequal
energy beam
rotatable shaft
energy radiation
variable aperture
pivotally connected
collimated beam
mechanism comprises
adjustment mechanism
guide rods
closed providing
interface edge
/378/976/