### 目 录

ZEMAX本身可以计算宏语言，例如可以计算依赖于MTF等系统的景深。

[code]

! Depth of Field

! Calculate depth of field

!

! Wenjie Nong 11-11-06

!

FORMAT 8.3

INPUT "Focal length(mm)",effl

INPUT "F/#",fno

INPUT "Subject distance(m)(Input 0 for infinity)",distance

INPUT "Circle of confusion(mm)",CoC

distance = distance * 1000

! 0.00029 is limited resolution angle of human eye in radian

! elsa = 0.00029

enpd = effl / fno

mag = effl / distance

!delta1 = ( distance*distance * elsa ) / (effl/fno - distance*elsa)

!delta2 = ( distance*distance * elsa ) / (effl/fno + distance*elsa)

distance1 = mag*enpd*distance/(enpd*mag - CoC)

distance2 = mag*enpd*distance/(enpd*mag + CoC)

! distance == 0 means focus at infinity

IF distance == 0

distance2 = enpd / (CoC/effl)

distance1 = 0

ENDIF

PRINT ""

PRINT "Calculates Depth of Field..."

PRINT "Focal Length = ",effl," mm"

PRINT "F/# = ",fno

PRINT "Subject distance = ",distance/1000," m"

PRINT "Circle of confusion(mm)",CoC

PRINT "Depth of field in front of subject(m) : ",(distance-distance2)/1000

PRINT "Depth of field behind subject(m) : ",(distance1 - distance )/1000

PRINT "Total depth of field(m) : ",( distance1 - distance2)/1000

[/code]

Focal length(mm) 填入镜头焦距

F/# 填入镜头F/#

Subject distance(m)(Input 0 for infinity)", 填入物距，如果是无穷远则为0

INPUT "Circle of confusion(mm)", 填入允许的弥散圆大小, 如0.031mm