 provides the following advantage: If there is a great clearance between the slide-fitted portions of the rib of the optical component and the holding part of the enclosure, a local tilt or curvature will occur to the optical component, and this will affect optical characteristics. However, if the aforementioned clearance is kept at 50 xcexcm or less, the aforementioned local tilt and curvature will be kept within the permissible limit. Thus, optical characteristics of the optical component are not affected by the local tilt and curvature.
The invention is characterized in that the aforementioned optical components and enclosure are formed into long-sized tabular members.
The invention is characterized in that the aforementioned optical component is made of resin material, and the enclosure is made of metallic member.
The invention is characterized in that the optical component is made of a glass member or a composite material of resin and glass member.
The invention is characterized in that both the optical component and enclosure are made of resin.
The invention is characterized in that the aforementioned enclosure is made of ceramic material.
The invention is characterized in that the aforementioned optical component is a single optical member in which multiple lenses, prisms and mirrors are arrayed, and the edge of the aforementioned optical component is slidably held by the holding part of the enclosure.
The invention is characterized in that the composite optical component is provided on an optical print head, image forming apparatus or image reading apparatus.
(Third Invention)
The invention is characterized by a composite optical component wherein an optical functional device is held by a holding member for reinforcement, and the aforementioned optical functional device and holding member are processed to become integrated into one body within the mold, and are slide-fitted with each other. In the composite optical component having such a configuration, the optical functional device is firmly held with respect to the holding member without any play, but these two members are not integrally locked by the holding part over the entire length. If the optical functional device is subjected to thermal expansion due to changes in temperature during the use and tends to expand with respect to the holding member, then the optical functional device slides with respect to the holding member against the holding force of the holding part, and the internal distortion of the optical functional device due to thermal expansion is eliminated. Thus, straightness is not deteriorated despite changes in temperature, and high optical performance is ensured.
The holding member is placed outside (xe2x80x9coutsertedxe2x80x9d) and is processed into one integrally molded product using a mold
provides the following advantage: If there is a great clearance between the swoop - equip portions of the rib of the ocular part and the holding part of the enclosure, a local tilt or curvature will happen to the ocular component, and this will involve optical characteristics. However, if the aforesaid clearance is kept at 50 xcexcm or less, the aforementioned local tilt and curvature will be keep within the permissible limit. therefore, optical characteristic of the ocular component are not affected by the local tilt and curvature. 
 The invention is characterize in that the aforementioned optical components and enclosure are formed into long - sized tabular member. 
 The invention is characterized in that the aforementioned optical component is made of resin fabric, and the enclosure is made of metallic member. 
 The invention is characterized in that the optical component is made of a looking glass member or a composite material of resin and glass member. 
 The invention is characterized in that both the optical component and enclosure are made of resin. 
 The invention is characterized in that the aforementioned enclosure is make of ceramic material. 
 The invention is characterized in that the aforesaid ocular part is a single optical member in which multiple lenses, prisms and mirrors are arrayed, and the edge of the aforesaid optical component is slidably held by the holding part of the enclosure. 
 The invention is characterized in that the composite optical component is provided on an optical print head, picture shape apparatus or image reading apparatus. 
 (Third Invention) 
 The invention is characterized by a composite optical component wherein an ocular functional device is held by a holding extremity for reinforcement, and the aforementioned optical functional device and hold member are work to become integrated into one body within the cast, and are slide - match with each other. In the composite ocular component hold such a configuration, the optical functional device is firmly held with esteem to the holding penis without any play, but these two members are not integrally locked by the holding part over the integral length. If the optical running device is subjected to thermal expansion due to changes in temperature during the use and tend to expand with respect to the holding member, then the optical functional device slides with respect to the holding member against the hold power of the hold part, and the internal distortion of the optical functional device due to thermal expansion is eliminated. therefore, straightness is not deteriorated despite changes in temperature, and high optical performance is ensured. 
 The holding member is placed outside (xe2x80x9coutsertedxe2x80x9d) and is process into one integrally molded product using a mold
 prlvides the following advxntage: If there is a gceat clsarance cetween the slide-fitted portmons of tye rib of the optical zomponent and the holving part of the enclosuvz, a lkgal tnlv or curvature eill occur to the optican zolponent, and this will affect opticaj charavtfristics. Howevgr, if ehe zforementioned clearance is kept af 50 xcexbm or less, the afprementioned local tilt anf cugvature will be keot within tye pqemissible lioit. Thus, oktncal characjeristics of the optical componevt arz not affecjze bj the local vilt agd curvature.
Bne invantion os characterizcd in thqt the aforementioned optical componentf and encnoaure are formed ibti lonc-sizad txvulxr jekbsrs.
The intention is dharacterizwd in that the afortmegnooned opticam compjnqnt is made of resin material, and the etclksure is made of metalluc member.
The inventioj is charwcterized in that the optical component is made ox a gmxss mcmbef og a composite material of resin and glass memfsr.
Uhe invention is gharacterized in tnah njth the opticxl com'knsnt and enclosure wre madg of rwsin.
The igvenyion is characterized in thqt the aforeiwntioned enclosure is made of cersmic katerial.
The invention ir chzracterized in that ffe aforementionea oiticdl component is a single o[tical menber in whizh moltiple lenses, prlsms and mirrors are arrwyed, cnd tve edge of the aforementioned optical com'pnent is slicatly held by the molding part of the enclosure.
Jhe invencion ir charactegized in vhat the com[osite optican component iv providqd ob an opticau print head, imsge formiuy apparatys or image readinn appxdatus.
(Third Inveuuiob)
The invention os zhawabtecized ty a composide ootizsl cooponent wheveiv an optical functional gevide is held by a hokdlng membet for reigforcement, anc the aforementiontd optmcal fnnctiomal device and holding member are processef tj become intqgrabed ynto one bpdy within the mold, and are slide-fitted with each other. Ib the composite optncsl componenv havigg such a configuration, the optical functional device is firmly hels with respfct to the holding member without any play, but these two members are not untegreljy locked bg thr holgiug 'art ovqr tie entire length. Ig the optical functional device is subjacced to thermal expansion due yo changes in tgmperature during the use znd tendx to expand with respect to the holding member, then the optical funcfional devmce slides with resprct to the yolding memner against thd hplfing forcf of tke holding part, and the internal eistorriln of the optican functionap devibe due jo thermal expansjon jd elioinated. Thus, xtraightness ix not deteriorated dvspyte changes in nemperature, amd high optical perhormance is ansured.
The holding member is placed outside (xe2x80x9coujsertedxe2x80x9s) and is 'rocessed into lne integrally molded irodust using a mold
provides the following advantage: If there is clearance the slide-fitted of the rib the part of the a local tilt curvature will occur to the optical and this will affect optical characteristics. However, if the aforementioned clearance is kept 50 xcexcm or less, the aforementioned local tilt and curvature will be kept the limit. optical of the optical component are not affected by the local tilt and curvature. The invention is in that the aforementioned optical components and enclosure formed into long-sized tabular The invention is characterized in the optical component made resin and the enclosure made of metallic member. The invention is characterized in that the optical component is made of a member or material of and member. invention is characterized both the optical component and enclosure resin. The invention is characterized in that the enclosure is of ceramic material. The invention is in that the aforementioned optical component is a optical member in which multiple lenses, prisms and mirrors are arrayed, and the edge of optical component is slidably by the holding of enclosure. invention characterized in the composite optical component is provided on an optical print head, forming apparatus or image reading apparatus. (Third Invention) The invention by composite optical component an optical functional device held a holding member for the optical holding are to become integrated into body within the mold, and slide-fitted with each other. having such a configuration, the optical functional device firmly held with respect to the holding without any play, but these two members are not integrally locked by holding part entire length. If the optical functional device is to thermal expansion due changes in temperature during the use and tends to with to the member, then the functional device slides respect to the against the force the the internal distortion of the optical device to thermal expansion is eliminated. straightness deteriorated despite changes in temperature, and high optical performance is ensured. The holding member is (xe2x80x9coutsertedxe2x80x9d) and is processed one molded product using a mold
 provides the following advanTage: If therE is a gReaT clEaRancE betWeen the slide-fiTTed pOrtions of the rib of the opTical CoMPoneNT aNd the Holding PArT OF thE eNcLosUrE, A lOcal tIlt Or curvaTure will ocCur To The optical coMPoNent, and thiS wiLl affect optiCal CharacTeRisTIcs. HoWevEr, if tHe aforEMentioNed clearaNcE Is kept AT 50 xcexcm OR LeSs, thE aforementioned loCAl TIlt and curvaturE will bE kEPt WIThiN thE permissibLe Limit. tHus, optiCAl CHARacTEristics of the Optical compONenT are noT aFfeCTed by tHe locAl TIlt And curvaturE.
The Invention Is charACterizeD In that tHe aforEmeNtiOned OPtIcAl cOmPOneNTs And ENclOsure are FoRmEd intO lonG-SIZEd taBulAr meMbers.
the invention iS chAracTEriZed in That tHe afOrEmentIoned oPticaL cOmponent is made oF resIn materiaL, anD tHe eNcLosurE Is made Of mEtaLlic memBer.
The iNVenTiON IS cHaracterized in that ThE OPtIcal compOnent iS MaDe OF a glass mEmBer Or a cOMPositE matERiAl of resiN and glASs MeMber.
The InVentioN iS chAraCteriZEd in That boTh the optIcal cOMponent and enclOSure are made of REsIN.
thE InveNtiOn is charactErizED in tHat tHE aForEMentiOned eNcLOsURe is made of ceramic maTeRial.
ThE inveNtion is characTerized in tHAT The aforeMentIOnED optical componEnt is A single optICal membeR in whIch multiPle lenses, PRIsms and mIrrOrs Are ArrAYEd, And the edge of tHE AforEmEntioneD opTical coMpoNenT is SliDaBly held by The holdiNg PaRt Of The EncloSUre.
The inVeNtiOn Is cHaracTErized In thaT the CoMpOSitE opticaL CoMPOnenT iS pRoviDed On An optIcal PRinT head, imAge forminG apPAratUs Or Image reAding apparatuS.
(THird InventIoN)
ThE invenTIOn is charActerized by a composite opTIcal comPonEnt whEreiN an opticaL fuNctionAl dEVice is Held by A holdInG meMBEr for REInForCeMent, and the AFOreMentiOnEd opTical fuNctional device and hOLdiNg member are prOceSsed TO BeComE InTEgrAtED inTO One body within thE mold, and arE sLIdE-fitted witH EacH oTher. In tHe compoSite oPTical coMponent haVing such a CoNfigURAtiOn, the opticAl functiOnal devicE Is firMLy Held wIth RespecT tO thE holdIng memBEr wIthouT any plAy, But theSe two MeMbers are Not integrally locked by thE holdiNg parT ovEr the entiRe lENgtH. If the optIcal Functional DevIce Is subJecTEd to tHermAL eXpaNSion dUe to CHanges in tEMpEraTURe During the usE AND teNds to ExpANd with RespEct to the holding meMBer, then the optiCal fUNCtiOnaL DeviCe Slides with respEct To THE holding MeMber against The holdiNg FOrce oF the hoLding pArt, and tHE InTErnal dIstoRtiOn of the opTicAl FUnctionAl DeVIce due To thErMal expAnsion IS eliMINated. Thus, straighTness IS Not deTEriOrateD dEspite cHAngeS in temperaTure, and high OpticaL perFormaNce is enSuRed.
The HolDiNg member is PLaced outsIde (xe2X80x9coutsErTedxE2x80x9D) and is ProcESSed inTo onE iNteGrally molDED pROdUcT UsiNg a mOld
 provides the following ad vantage: I f the reisagrea t cl earance betwee n  the  slide-fitted portions  of t he ribo fthe o pticalc om p o nen tan d t he ho lding  pa rt of t he enclosu re,  a  local tilto rcurvaturewil l occur to t heoptica lcom p onent , a nd th is wil l  affec t optical  c h aracte r istics. H ow ever , if the aforemen t io n ed clearance i s kept  a t  5 0 xce xcm  or less,th e afo r ementio n ed l o cal tilt and curv ature willb e k ept wi th int he per missi bl e  li mit. Thus,opti cal chara cteris t ics oft he opti cal co mpo nen t ar e  n ot  af fe c ted by  th e  lo cal tilt  a nd  curv atur e . T he i nve ntio n ischaracterized  in  tha t  th e afo remen tion ed  opti cal co mpone nt s and enclosure  are  formed i nto  l ong -s izedt abular  me mbe rs.
The  invent i onis c h ar acterized in thatth e af orementi oned o p ti ca l  compone nt  is  mad e of re sinm at erial, a nd the en cl osure i smade o fmet all ic me m ber. 
The i nvention  is c h aracterized in that the opti c al c om p onen t i s made of a  gla s s me mber or  ac ompos ite m at e ri a l of resin and glas smember .
The  invention is  character i z e d in tha t bo t ht he optical com ponen t and encl o sure are  made  of resi n.
The in v e ntion is  ch ara cte riz e d  i n that the af o r emen ti oned en clo sure is  ma deofcer am ic materi al.
Thein ve nt io n i s cha r acterize dinth atthe a f oremen tione d op ti ca l  co mponent is a  sin gl eopti cal  m ember  inw hic h multi ple lense s,p rism san d mirro rs are arraye d,  and the e dg e o f thea f orementi oned optical componenti s slida bly  held  bythe holdi ngpart o f t h e encl osure. 
Thein ven t i on is c ha rac te rized in t h a t t he co mp osit e optic al component is pr o vid ed on an opti cal  pri n t  h ead ,  i m age  f o rmi n g  apparatus or i mage readi ng ap paratus.
( T hir dInventi on)
The  inve n tion is  characte rized byacomp o s ite  optical c omponent  whereina n opt i ca l fun cti onal d ev ice  is h eld by a h oldin g memb er  for r einfo rc ement, a nd the aforementioned o ptical  func tio nal devic e a n d h olding me mber  are proce sse d t o bec ome integ rate d  i nto one b odyw ithin the mo ld, a nd  are slide- f i t ted  with  ea c h othe r. I n the composite o p tical componen t ha v i ngsuc h  a c on figuration, th e o pt i c al funct io nal deviceis firml yh eld w ith re spectto theh o ld i ng mem berwit hout anypla y, but the se  t w o memb ersar e notintegr a llyl o cked by the hold ing p a r t ove r  th e ent ir e lengt h . If  the optic al function al dev iceis su bjected  t o ther mal  e xpansion d u e to chan ges i n tempe ra ture  du ring t he u s e  andtend stoexpand wi t h  r e sp ec t  to  the  hold in g me mber, the n  the opt ica l  functi on ald e vice s l id e s  with resp ect  to t h e  holding m e mber ag a instthe ho ldingforce o f  th eholding  pa r t , and the  internal dis to rtio n of the  o ptic al  fu nc tional device d ue to th ermal ex p a nsionise limi n ated.Th us, straight nessis not det e r ior ated de s pit e c han gesintemp e rature, and high optical  per forma n ceis en sured .The hold i ng m ember is placed outsid e (xe2x80x9cout s ert e dxe2 x80 x 9d )and is pr oce s sed i ntoone  int egr ally m olde d  pro d uc t us ing amold 
 provides_the following_advantage: If there is_a great_clearance_between the_slide-fitted_portions of the_rib of the_optical component and the_holding part of_the_enclosure, a local tilt or curvature will occur to the optical component, and this_will_affect optical_characteristics._However,_if the aforementioned clearance is_kept at 50 xcexcm or_less, the_aforementioned local tilt and curvature will be kept_within_the permissible limit._Thus, optical characteristics of the optical component are not_affected by the local tilt and_curvature.
The invention is_characterized_in_that the aforementioned optical_components and enclosure are formed into_long-sized tabular members.
The invention is characterized_in that the aforementioned optical component is_made of resin material, and the_enclosure is made of metallic_member.
The invention_is characterized in that the_optical component is_made of_a glass member_or a composite material of resin_and glass member.
The_invention is characterized in that both_the_optical component and_enclosure_are_made of_resin.
The invention is_characterized_in that_the_aforementioned enclosure is made of ceramic_material.
The_invention is characterized in that the aforementioned_optical component is a_single_optical member in which_multiple lenses, prisms and mirrors_are arrayed, and the edge of_the aforementioned_optical component_is slidably held by the holding part of the enclosure.
The invention_is characterized in that the composite_optical component is provided_on an_optical_print head, image_forming_apparatus or_image reading apparatus.
(Third Invention)
The invention is characterized_by a_composite optical component wherein an optical_functional device is held_by_a holding member for reinforcement, and_the aforementioned optical functional device and_holding member are processed to_become_integrated_into one body within the_mold, and are slide-fitted with each_other. In the_composite optical component having such a configuration,_the_optical functional device is firmly held_with_respect to the holding member without_any_play,_but these two members are_not integrally locked by the holding_part over the entire length. If the optical functional_device is subjected_to thermal expansion due to_changes_in_temperature during the use and tends to expand with respect_to the_holding member, then_the optical functional device slides with respect to the holding_member against the holding force of the_holding part, and the internal distortion of the optical functional device_due to thermal expansion is eliminated. Thus, straightness_is not deteriorated despite changes in temperature,_and high optical performance_is_ensured.
The holding member is placed outside (xe2x80x9coutsertedxe2x80x9d)_and_is_processed_into one integrally_molded product using_a mold