anastigmat

/uh-nas-tig-mat, an-uh-stig-mat/US // əˈnæs tɪgˌmæt, ˌæn əˈstɪg mæt //UK // (æˈnæstɪɡˌmæt, ˌænəˈstɪɡmæt) //

桅杆,桅竿,桅桅,桅子

Definitions

n.名词 noun

1
Optics.
- : a compound lens corrected for the aberrations of astigmatism and curvature of field.

For those, however, who wish even greater efficiency and capabilities, we supply the anastigmat lens equipments.
This makes a most desirable outfit at a surprisingly low price for an anastigmat equipment.
This lens has been specially designed for this particular use by the makers of the well-known Cooke Anastigmat lenses.
The "double anastigmat" of Goerz of Berlin was put on the market in 1893.