The Illustrated Optical Manual, Or Handbook of Instructions for the Guidance of Surgeons in Testing Quality and Range of Vision, and in Distinguishing and Dealing with Optical Defects in GeneralLongmans, Green, 1888 - 239 páginas |
Dentro del libro
Resultados 1-5 de 47
Página 6
... focus of the pencil . When the divergency of rays proceeding from a remote point of light is inappreciable , the rays are described as parallel rays . When rays are artificially A F B FIG . 7 . A , pencil of rays diverging from the focus ...
... focus of the pencil . When the divergency of rays proceeding from a remote point of light is inappreciable , the rays are described as parallel rays . When rays are artificially A F B FIG . 7 . A , pencil of rays diverging from the focus ...
Página 19
... focus - or to diverge as if they proceeded from the principal focus . Cylindrical lenses will be described separately . Convex and Concave Lenses . - The lenses which are chiefly used for optical and ophthalmoscopic purposes are centric ...
... focus - or to diverge as if they proceeded from the principal focus . Cylindrical lenses will be described separately . Convex and Concave Lenses . - The lenses which are chiefly used for optical and ophthalmoscopic purposes are centric ...
Página 20
... focus ; c , centre of curvature of ACB ; D , centre of curvature of ADB ; PR , PR , incident rays parallel with CD , converge as EE , after passing through the lens , and meet at F. lens ( like the crescent moon ) ; if the concavity be ...
... focus ; c , centre of curvature of ACB ; D , centre of curvature of ADB ; PR , PR , incident rays parallel with CD , converge as EE , after passing through the lens , and meet at F. lens ( like the crescent moon ) ; if the concavity be ...
Página 21
... focus of a convex lens is usually spoken of as the focus of the lens ; and the distance of this focus is used to particularise the lens . Thus taking , e.g. , a lens whose principal focus is at 10 inches from its centre , it may be ...
... focus of a convex lens is usually spoken of as the focus of the lens ; and the distance of this focus is used to particularise the lens . Thus taking , e.g. , a lens whose principal focus is at 10 inches from its centre , it may be ...
Página 22
... focus at F ' , between the lens and the principal focus , F , to which 7 , paral'el rays are brought ; " , diverging rays arising in front of AF , the anterior focus , meet at F " , beyond the principal focus ( F ) . and F being on the ...
... focus at F ' , between the lens and the principal focus , F , to which 7 , paral'el rays are brought ; " , diverging rays arising in front of AF , the anterior focus , meet at F " , beyond the principal focus ( F ) . and F being on the ...
Otras ediciones - Ver todas
The Illustrated Optical Manual: Or Handbook of Instructions for the Guidance ... T. Longmore Sin vista previa disponible - 2018 |
The Illustrated Optical Manual, Or Handbook of Instructions for the Guidance ... Thomas Longmore, Sir Sin vista previa disponible - 2016 |
Términos y frases comunes
accommodation acuteness of vision amblyopia ametropia ametropic amount of Acc appear army asthenopia astigmatic eye astigmatism axis binocular vision bull's-eye cause centre ciliary muscle colour colour-blindness concave lens convex lens cornea correcting lens correction Crown 8vo curvature cylindrical lens defect Diagnosis diffusion dioptric diplopia direction distance distant objects distant point distinct vision emmetropic examination exerted exist eye under observation feet focal fundus glasses inches keratoscopy left eye lenses lessened medical officer meridian Mc military service mirror myope myopic neutralised normal acuteness ocular ophthalmoscopic optic parallel rays patient person placed point of distinct power of Acc practice principal focus principal meridians prism rays of light rays proceeding recruit refractive defect refractive power refractive quality regards rendered retina retinal images rifle right eye seen shadow sight soldier spectacles spherical strabismus surgeon target test-dots tion unfit visual acuteness visual angle visual lines
Pasajes populares
Página 10 - A System of Surgery, Theoretical and Practical, in Treatises by Various Authors.
Página 14 - TREASURY OF KNOWLEDGE AND LIBRARY OF REFERENCE. Comprising an English Dictionary and Grammar, Universal Gazetteer, Classical Dictionary, Chronology, Law Dictionary, &c.
Página 16 - INDUSTRIAL CHEMISTRY; a Manual for Manufacturers and for Colleges or Technical Schools ; a Translation of PAYEN'S ' Precis de Chimie Industrielle.
Página 17 - Other Worlds than Ours ; The Plurality of Worlds Studied under the Light of Recent Scientific Researches.
Página 15 - Miller. — WORKS BY W. ALLEN MILLER, MD LL.D. THE ELEMENTS OF CHEMISTRY, Theoretical and Practical. Re-edited, with Additions, by H. MACLEOD, FCS 3 vols. 8vo. Part I. CHEMICAL PHYSICS, i6^.
Página 7 - FRS THE SCIENCE AND ART OF SURGERY: Being a Treatise on Surgical Injuries, Diseases, and Operations. With 984 Illustrations.
Página 5 - A General History of Greece from the Earliest Period to the Death of Alexander the Great, with a sketch of the subsequent History to the present time. New Edition. Crown 8vo. Cloth, price 7$. 6d, Tales of Ancient Greece.
Página 4 - RELIGIOUS and MORAL WORKS. An Exposition of the 39 Articles, Historical and Doctrinal. By EH BROWNE, DD Bishop of Winchester.
Página 11 - CRITIQUE OF PRACTICAL REASON, AND OTHER WORKS ON THE THEORY OF ETHICS.
Página 21 - NOTES of a COURSE of SEVEN LECTURES On ELECTRICAL PHENOMENA and THEORIES, delivered at the Royal Institution AD 1870.