INVESTIGATION OF SURFACE
UNIFORMITY OF A. THEN SELVER
\X’EDGE BY THE RECORDING
INTERFEROMETER

THESIS FOR THE DEGREE 8? M. 8.
Ray L‘ Griffith
1934

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PF 1393 than 2 half a wnxx -1no1‘n c? lijht. $112 211
ohfoots that 9?? 193? thin tb1u lifiit ittgvferonce end
if? fPfiC‘fi n o? linht nlwys are
PP“@W? to be tPVtanp bwt Wh‘t the? Pgtrully MPG. &11
13mg systems from the sfPhl st iclgaoono to *H3 most
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find WOPE 1n the orcor of P $3311 va3tfon of e l? dt-WMVG.
Tn this case, an interference svstnm 13 used mtich can
W‘WFUfifl 1% 4H3 CFC??? of a milliongh of on ihcn.

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d'ff*cw7t to obtain a raid smuwaa cf vcnochfiarnt*c lifiht.

(n tha cfificr hand, Vhite 13¢Ht is eyfrnwalw easy ta Cbta‘n,

I ‘ncfifibcocwht 1hr? fire? as an EUtO‘

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wavhmbs f5: most valuable cfintvibuticn to tne use

C I " Q . '-

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of thq fififi"PfU?OWthP is tn: cvnvwrt.nw ”me oru;nary ”Lonel-

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awn hr Chamnavln:n Serra n0 imbue :?wmet3r into a LUCOB'JnH
YI‘ ‘ -‘ ’- V f‘ w V~ 0" ‘ ‘- ‘1? .Irjnr“ ". V ‘ ~.-'fl ‘ ‘ 9w "
TnTerrch v tAT'I,Rw'Y$? wfiitxa 13.xlt. .;4.s « atrngxnt :Ags

r “t - " -- ' w 1"”- N - ‘2'. 1" 5‘ ‘ i ' ‘0‘ ‘5 ' ' i 'I‘” a "' ‘ ‘ N,
hav'wctzd b; kw. {a ~. (21¢ n¥ria n at «103-gan “papa College

0

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T = We 9--»7wt? 0 .ntarfe inr
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if the Wfivo-lnnVL.

are known, thin the a

nrasnzd in tTTfiS of the nuflhev of bands bctfieeL the two

knmwn llnafi.

Let L’ flnd L" be the known wave-lénfifhs

n' 0n n" he th‘ covreswmnfi‘nr :ntegers

_-.-‘-'

Vt n: Fe 2 (n' - 1/2jL' or Te/L' = n' - 1/2 (2)

0"

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fie(1/L' ~ 1/1") = n' ~ n“ (9
'3‘3'fi8 5°, {Ch-”3 ff’én<1??‘?‘.1 e-‘f71"-ti=rn used with rc=acr-1*Cin
e is t‘n? smtn-fl. thickness Cf.‘ the air film r1-3._su;"ec3.
n' ~21" is. tha act's-521 numb?!» Cf ‘nr'nr‘és biz-t-geen the two

known f¢Vé~lfinfiths.

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”nk’wn the S*1v*r “efifia:

-— ~v. .m-n.»*-*..v~a¢.~h.n‘ w no“ d.w- «own--

\5'

A thfn silver wedte was Wu®\ by filqc?ng tw
onticnl nlnt93 a8 Shaun in fvrwre fi. Qhosa plvtes had
bWGn clannfifi V“?F c fiefwlir with “cifl find thnrmwghlv
mastafi fi*th dist‘139d water of rCOfi “emvnruture. ¥tanfl-
and silvsring wolntfinn of tne Focfielle Salt p»oc¢ss was
ueoé. The solution was povrqd at the corner n93?est tha

M, ‘~ ... ..‘ ‘1 '.. . 4L .
gee-e uno Swot CJmLSU 1n-

SL-‘cnulfl: :.'£?t.;‘.-(}!'1 time '..]..;2th3.

 

Th3 Fepcsft szsrtsd rfither
“‘3' 5 rapid mt the gmrizlt of the

xor ‘ if“ . 2 1'- ‘- 1x 1 l' T 4- .
4wQ~P emu eroanlwy canostunt

a
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{n the thicker Gav“. Care was taken not to jar or wove

,.-.1

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the n).:1t=',.«s. 72.0-03‘9 anr- 4:17 of tna S‘lvep engré-szltm to bong

(“I

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.‘4 +. 1 .- . l. x ‘ . ..o A.
Lyn tso alauas, tnay mare sang“ tad at as not to vutn n8

.‘ ' ' ' ‘ ‘ ‘1 ' - ‘ - ' f 'l h’ \‘. - v
flwtgfifi. Lhe tcn plate «13 used in Inter reagupoqunts.

. 1 4. ‘ 0 ...~ .L. ‘ ,-. .-~ 3 z . .0 .. 1,.
;*tn a Rb?%lfdb ergo 1nd A cull knife part 0L tte Silver

... +— ‘ - 3', , n " u! 3 s l.’ , -? V
4Hu 01 £39 Ln c; enq, leavmnr

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-‘O'If-M-OM—QW‘.‘ -¢W~w -1. -.—O 6-0-...—

$hn Rip? 3 of th: txo um 71 mirrors rsru sot
9“: (gm-froxfir "1:54:17; {7'7" hf? n. S‘“!"ll trié‘mffle out From c--~1~d-
Erwiwr. ‘tm3 ligfiwt as 614fu=1~‘0 :v‘cht;}y.t *wqa 1‘ 0 1n>f1_ncu-

. Gna of the mirrors

1
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was n6vaved to so; that the tvn rays WRTG not C“ 88%6, as
ft in very immortant that thns: Pays We tar-1191. Virrcr

(3) W63 tiltnd t 399 if the r fluctinns $.9n on mirror

SNlch.fi:: a T”?1 in 147% rmfifl: of 1?:9 1E~fl1t fw‘ tka frfigrrfeqwxm:tnr.
one fvnm ouch beam. It

is nflcns~a-y to rotwte on; o? tdfi srnll mirvors Slifihtly
unufil the two fwnfics Sufirrfiwycse. On thfi hack Cf the small
one to turn the vlrror alhfiut a v~rti-

mirror is two screws,

cal axis, nnfi tne 0. he" to tilt the mfirfior about a hnrizCP
tnl Uxfs. “he tflpg of the two iwmras of the min wns made

a .1 _ _ " V "6 -
to coincvda by waving one of thasa 306963. Rimes new appeared

u".

field find the nfimhmr cruld be vnried by turnlfiq GHQ
of thm bfick screws which rotated the mirwor sli:ht1t. The
nthqr bficr scrow tendad to str146R‘01 the bands so thwt

thew coulé be w~flz2 to annesr cithwr in a horizontal or vart::c:11

-15-

' H ‘ CW 22.3.7111? *1; .“ilz”?V is! 11.3225 {Tr-7.11;..‘xinc' mirror
I. \ - v. '1 - " fl - .. . , m
a? lfIP ‘rvsz as tfiarflhCJ‘YQ .'ch.' 0 Twnstitfll as

"fl My r7 -?

,_. 1. [1‘ LS -‘ n
1

n._ . ‘ y'—

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1' fl 's 7‘

.‘.Q t;|j L)

A ’ - v - r- -- «W A ‘ 1,. .. ‘J -- . ‘ ’ ‘- f .
:cs;t;oa w~ a fig Cu,0 Lu uu.pe lfiqht
' ‘ ~ .. " ~43 . _ :1 _. ‘
w* s lqufi- for eif ta avg glue Out of
n ‘ “_- ‘ - 5" _ J” J ‘_. N“ . "1 fl _.
mi ‘8 {‘3‘” It "716:. "sz1 ‘.J M: ';; Man’bs J, ..I‘St

7.. - . r- -14- C‘ 'v' 1-1 . " ,'
?~ urea it) “11 {J: 92 11.. _.u t .Lu, so
. ‘ , . . ‘ - . .. '.- . .‘7‘ .‘I
of fine flulé for-”CV Lu:?r Cunt-P. lan

tha f‘ald .'> .r at? i*h‘ g naese bands

£3W3>b {TTPCEIN‘

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«3 ' l. :33 l‘fnm; .L;. . To, 1.43:? .31“? 1;...st

Cami? 11y EWUWgfit mtg ‘hé fiflld C“ tfiPfi’fij 3&3 J ”33 Ce? Evue
mm? W. ’Weu: U?3t9 T““i fFKHEJS nan n* ~99 d In tha field
”’t*rrt tfis aid 0? :hn grating. :39 screw wrs b Che: off
51",3‘1’t-1y such f‘mt +7510 "rrh? we, 1’:;§"*:t f2"‘-"15”3S a :.‘-Ll'c'1.‘£"*3d a little
uayn out of flue ?331d W‘-fl v’e id thrrngh tha grat’ng.

fu77y
fi'm a

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lighb ‘as .Cd pnrnu” um nnm Lne $3353hhflnt Vu?{ care;
radj1‘~..t:'zd 1‘--".-r cifi’r‘ctilrm "'3 "20:311. hrznds 7'37 rifJCi'fift {3‘10 2:3}?
I. L.’
-.-. ‘ "... 'n-‘ , - .- $0., . - w- *
.111 fifi:”{1J¢1_ arsnys. 4; swvill ffi°20Ls¢w1 “f {a LHITI on.txxe

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