laternal spherical aberration
横条球面像差

• unactivated
• unactivated state
• unadjusted eye
• unaided eye
• unannealed
• unbacked film
• unbalance
• unbalanced sight
• unbiased
• unblanking
• unblemished surface
• unblocking
• unbound electron
• uncertainty
• uncertainty condition
• uncertainty principle
• uncertainty relation
• uncharged particle
• unchecked
• unchirped
• unchopped radiometer
• unclad fibre
• uncoated
• uncoated laser
• uncoated lens