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美国湍流模拟器

2018-04-27|来自:梦溪|发布:梦溪

 随着天文成像、光通讯及遥感探测等的迅速发展,光传输的大气湍流效应越来越引起人们的重视,湍流模拟器进行实验室模拟,可为工作于随机涨落介质(大气)中的光学仪器提供实验室条件下的测试和评价手段.Lexitek公司开发的湍流模拟器的功能是对入射光的位相进行调制,产生畸变的湍流波前,为待测光学系统提供模拟的大气湍流环境.

 
 
 

Turbulence Phase Plates

湍流模拟器的主要功能是产生动态像差. 美国Lexitek公司的湍流模拟器由湍流屏(相位板),旋转平台及马达控制器组成.
 
The surface is machined with the design optical path difference (OPD) scaled by 1/∆n. Optical windows with AR coatings are typically bonded to the sandwich for improved surface quality and parallelism.  

 

 

SPECIFICATIONS 

Transmission from 400-1600 nm 

Dimensions to 300x150mm, 150mm diameter

Continuous phase surfaces machined with ball end mill, typically 1/32” diameter

Discontinuous phases with flat end mill

Surface height step 1.2 µm, 5 µm accurate

n range 0.01-0.05

Phase specified by numerical array provided by the customer or designed by Lexitek to your specifications (e.g., r0 in mm)

Unique phase for each part at no extra charge

 

 

TYPICAL PARAMETERS

Continuous surface with BK7 windows

100 mm diameter, 83 mm active area

22 mm thickness

4096x4096 phase array~20 µm phase grid/10 external surfaces

Broadband AR coating <0.6% reflection

15 arcsec parallelism, 30 arcsec max

OPD step 0.02 µm, 0.09 µm accurate

OPD range 5-30 µm (min-max)

 

STAGE PARAMETERS WITH STEPPER MOTOR DRIVE

 

   HS-100  LS-100  LS-100-SU  LS-50
Motor Steps  200  400  200  400
Gear Ratio  3:1  6:1  6:1  4:1
Motor Torque oz-in  83  4  45  16
Motor Size  Nema 17  Nema 14  Nema 17  Nema 17
Guaranteed Speed (rpm)  300  10  100  100
Typical Max Speed (rpm)  >400  >40  >200  >200
Travel  360°  360°  360°  360°
Approx. Weight (lbs)  5.5  3.5  4.5  2.5
Max Part Diameter  100mm/4"  100mm/4"  100mm/4"  50mm/2"
Clear Aperture*  3.75"  3.75"  3.75"  1.75"
Microsteps  1, 2, 4, 8  1, 2, 4, 8  1, 2, 4, 8  1, 2, 4, 8
Full Steps/Rev  600  1200  2400  1600
Max Microsteps/Rev  4800  19200  9600  12800

 

相关标签:湍流模拟器,自适应光学系统,波前像差
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