rect_screen - filters the field through non-transparent rectangle screen.

Calling Sequence

[pfield_out]=rect_screen(field_in,sx[,sy[,x_shift[,y_shift[,angle]]]])

Parameters

• field_in :input field. it must be diffractive wavefront.
• sx : the size X direction of the aperture in meters.
• sy : the size Y direction of the aperture in meters.( default is sx)
• x_shift : the shifts of the X direction in meters. ( default is 0.)
• y_shift : the shifts of the Y direction in meters. ( default is 0.)
• angle :the initial angle of the aperture in radian.( default is 0.)
• field_out : the output field or diffractive wavefront.

Description

filters the field through non-transparent rectangle screen.

Examples

	F1=begin(0.01,1e-6);
	F2=rect_screen(F1,0.004,0.004,-0.0015,-0.002);
	field_plot(F2);
	dwf_fits(F2,"F2");	
 

Author

Chen jingyuan, Gan guangyong (IAPCM, Beijing,China.)

See Also

rectang ,   rect_ap ,