C-1 : 0.59 * (WaveLength) / (ObjectiveLens.NA) < SpotSize

C-2 : Min.SpopDepth * < 0.59 * (WaveLength) / (ObjectiveLens.NA) * sqrt((1/(ObjectiveLens.NA))** 2 - 1) < Max.SpotDepth

C-3 :
2*0.59 * (WaveLength) / (ObjectiveLens.NA) * sqrt((1/(ObjectiveLens.NA))** 2 - 1)*(FieldLens.FocalLength)**2/(ObjectiveLens.FocalLength)**2 < AxialTolerance

C-4 :
-2*0.59 * (WaveLength) / (ObjectiveLens.NA) * sqrt((1/(ObjectiveLens.NA))** 2 - 1)*(FieldLens.FocalLength)**2/(ObjectiveLens.FocalLength)**2(ObjectiveLens.MovingRange) < ObjectiveLens.MovingRange < 2*0.59 * (WaveLength) / (ObjectiveLens.NA) * sqrt((1/(ObjectiveLens.NA))** 2 - 1)*(FieldLens.FocalLength)**2/(ObjectiveLens.FocalLength)**2

C-5 :
ObjectiveLens.WaveLength = LaserDiode.WaveLength = WaveLength

C-6 :
if(PD.type is knife-edge)
{        DearZoneSpec. < 0.59*(WaveLength)/(ObjectiveLens.NA)* 2/(ObjectiveLens.FocalLength)*0.01 }

C-7 :

if(Optics.type is discrete)
{       CollimatedLens.WaveLength = ObjectiveLens.WaveLength }

C-8 :

SeekingMotor.force / PUH.weight > 100*RunoutTolerance*DiskRotationMotor.Frequency**2

C-9 : Weight < 400 grams
C-10 : Cost < 25 dollars
C-11 : Power consumption < 1000mW