The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光谱基本原,给出了波差法设计复消色差物方程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治视眼器，它有作为物凸透、筒、目，还有头套和透组，它用于人们在上长时间用眼时戴在眼上，可以使被视物像清楚、放大和变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级基本原理,给出了波差法设计复消色差物方程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼理疗器，它有作为物凸透、筒、目，还有头套和透组，它用于人们在近距离长时间用眼时戴在眼，可以使被视物像清楚、放大和变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光谱基本原理,给出了波差法设计复消色差物方程。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼理疗器，它有作为物、筒、目，还有头套和，它用于人们在近距离上长时间用眼时戴在眼上，可以使被视物像清楚、放大和变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光谱的基本原理,给出了波差法设计复消色差物的方程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼的理疗器，它有作为物的凸、筒、目，还有组，它用于人们在近距离上长时间用眼时戴在眼上，可以使被视物的像清楚、放大变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光本原理,给出了波差法设计复消色差物方程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼理疗器，它有作为物凸透、筒、目，还有头套和透组，它用于人们在近距离长时间用眼时戴在眼，可使被视物像清楚、放大和变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光谱的基本原理,给出了波法设计复物的方程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近眼的理疗器，它有作为物的凸透、筒、目，还有头套和透组，它用于人们在近距离上长时间用眼时戴在眼上，可以物的像清楚、放大和变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍二级光谱的基本原理,给出法设计复消色物的方程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼的理疗器，它有作为物的凸透、筒、目，还有头套和透组，它用于人们在近距离上长时间用眼时戴在眼上，可以使被视物的像清、和变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光谱的基本原理,给出了波差法设计复消色差物的方程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一近视的理疗器，它有作为物的凸透、筒、目，还有头套和透组，它于人们在近距离上长时时戴在上，可以使被视物的像清楚、放大和变远。

The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光谱基本原理,给出了波差法设计复消色差物程组。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视理疗器，它有作为物凸透、筒、目，还有头套和透组，它用于人们在近距离长时间用时戴在，以使被视物像清楚、放大和变远。