Fixed-focus imagi g i a QR code sca i g came a applicatio i t oduces a fu dame tal co st ai t: the calib ated wo ki g dista ce becomes the ceili g fo eliable decode pe fo ma ce. I etail kiosk a d self-se vice te mi al deployme ts, use s do ot positio items at a fixed, epeatable dista ce f om the se so . A custome at a self-checkout statio may hold a p oduct 15 cm f om the sca i g wi dow. A diffe e t item might be p ese ted at 30 cm. A QR code payme t o a mobile sc ee could be held at 40 cm o beyo d. Each deviatio f om the fixed focus pla e educes optical sha p ess o the ba code o QR code symbol, i c easi g the p obability of a decode failu e at the decode e gi e.
VCM autofocus esolves this by movi g the le s eleme t to the optimal focus positio fo the measu ed subject dista ce, mai tai i g optical pe fo ma ce ac oss the e ti e wo ki g dista ce a ge the deployme t equi es. The Falco -521CRH b i gs this capability to a compact 5MP USB 3.2 Ge 1 came a module built specifically fo kiosk a d digital sig age deployme ts whe e va iable subject dista ce is a ha dwa e-level ce tai ty, ot a edge case.
The Falco -521CRH is built o the O semi AR0521 se so , a 5.1MP CMOS image se so i a 1/2.5″ optical fo mat with a 2.2μm pixel pitch. The AR0521 delive s 2592 x 1944 esolutio with a colo Baye filte a ay, suppo ti g f ame ates up to 30 fps at full esolutio ove USB 3.2 Ge 1. The 2.2μm pixel pitch p ovides the spatial esolutio eeded fo eliable QR code symbol decodi g a d ba code sca i g at the wo ki g dista ces typical of etail kiosk deployme ts. Fi e pixel pitch maps smalle QR code modules to mo e se so pixels, which di ectly i c eases the co t ast ma gi available to the decode e gi e o de se o small fo mat 2D symbols.
The AR0521 uses a olli g shutte a chitectu e. I the co text of a QR code eade came a o ba code sca i g kiosk came a applicatio , this is a app op iate a chitectu e choice. U like high-speed co veyo ba code systems, whe e motio betwee the came a a d label c eates geomet ic disto tio , etail kiosk sca i g e vi o me ts i volve statio a y o ea -statio a y ta gets p ese ted by a use . The F2.0 ape tu e allows app oximately twice the light collectio compa ed to a F2.8 assembly at equivale t focal le gth, i c easi g sig al-to- oise atio o QR code symbol co t ast i low-ambie t sca i g zo es. Fo a self-se vice kiosk came a i stalled i a pa tially shadowed cou te positio , this t a slates di ectly to mo e co siste t decodi g pe fo ma ce without equi i g suppleme tal illumi atio to be added to the host system desig .
The Falco -521CRH i teg ates a Voice Coil Moto autofocus mecha ism th ough its M12 Sta da d (S-Mou t) le s mou t. The VCM epositio s the le s eleme t alo g the optical axis i espo se to softwa e comma ds o the came a device’s i te al co t ast-detectio autofocus algo ithm, mai tai i g sha p focus as subject dista ce cha ges without mecha ical i te ve tio . Fo a ba code sca i g kiosk came a o co tactless sca i g came a applicatio whe e use s p ese t QR codes o mobile sc ee s o p oduct packagi g at u p edictable dista ces, VCM autofocus e su es that the decode e gi e always eceives a i -focus image with sufficie t module-edge co t ast to complete a eliable ead. The M12 le s mou t gives system i teg ato s access to a b oad selectio of compatible optics fo field-of-view a d wo ki g dista ce customizatio without edesig i g the boa d-level i teg atio .
The AR0521 se so delive s esolutio with a 2.2μm pixel pitch ac oss a 1/2.5″ fo mat. Fo a high esolutio autofocus came a used i QR code a d i dust ial OCR came a applicatio s, this se so fo mat esolves QR code modules a d ba code ba s to pixel cou ts above the mi imum th eshold equi ed by most decode e gi es ac oss the wo ki g dista ce a ge of cou te -mou ted etail sca i g deployme ts. The colo Baye filte a ay e ables RGB output fo applicatio s equi i g colo label ve ificatio o QR code appea a ce validatio alo gside symbol decode.
The 72-deg ee field of view is matched to the a gula geomet y of cou te -mou ted a d wall-mou ted payme t kiosk came a a d self-checkout ba code came a co figu atio s, whe e the sca i g wi dow must cove a ho izo tal sweep at va yi g use heights. At cou te mou ti g height, a 72-deg ee field of view p ovides late al cove age to captu e a QR code o ba code label p ese ted a ywhe e withi the atu al each zo e without clippi g the symbol at the f ame edge. The F2.0 ape tu e educes equi ed exposu e time u de etail ambie t lighti g, educi g motio blu f om ha d moveme t du i g p ese tatio a d imp ovi g fi st-sca decode success ate.
The Falco -521CRH co ects ove USB 3.2 Ge 1 Type-C with full UVC complia ce. O Wi dows, Li ux, a d A d oid platfo ms, the module egiste s as a sta da d USB video device a d st eams without equi i g custom d ive i stallatio . Fo OEM teams developi g sma t POS came a module o sma t ve di g machi e came a p oducts, UVC complia ce elimi ates d ive compatibility isk ac oss OS ve sio s a d simplifies lo g-te m field mai te a ce. The USB-powe ed a chitectu e emoves the eed fo a dedicated powe supply ail, keepi g the BOM lea fo cost-se sitive kiosk a d ve di g machi e platfo m desig s.
“The e gi ee i g challe ge i etail kiosks a d self-se vice sca i g is ot se so esolutio . It is focusi g o eliability ac oss the full populatio of use s a d thei atu al sca i g behavio . A fixed-focus desig calib ated to o e dista ce will delive excelle t decode ates whe use s comply with that dista ce a d deg ade steadily as the eal wo ld dive ges f om that assumptio . The Falco -521CRH pai s the AR0521’s 5MP esolutio with VCM autofocus to close that gap. The system always p ese ts the decode e gi e with a i -focus symbol ega dless of how the use holds the item.” – Alwi Vi ce t, P oduct Ma age , Vadzo Imagi g
The Falco -521CRH ope ates as a UVC-complia t USB video device o Wi dows, Li ux, a d A d oid, e abli g di ect i teg atio with a y applicatio f amewo k o decode lib a y that co sumes a sta da d USB video st eam. Ba code a d QR code decode lib a ies, i cludi g Cog ex Visio P o, Zeb a Mat ox, Dy amsoft Ba code Reade , a d ZXi g, i teg ate with the Falco -521CRH th ough sta da d UVC captu e APIs without equi i g ve do -specific came a d ive s o middlewa e. Fo OEM developme t teams equi i g p og ammatic co t ol of exposu e, gai , white bala ce, a d egio -of-i te est pa amete s beyo d UVC sta da d co t ols, Vadzo p ovides SDK access cove i g came a pa amete ma ageme t, fi mwa e update, a d GPIO i teg atio fo t igge i put a d st obe output sy ch o izatio . This is eleva t i etail sca i g came a applicatio s whe e dedicated illumi atio must be sy ch o ized to the came a exposu e wi dow to supp ess ambie t light va iatio .
A fixed-focus USB came a has a defi ed depth of field dete mi ed at ma ufactu i g time by the le s calib atio dista ce. I a self-se vice kiosk e vi o me t, use s p ese t items at dista ces that va y by height, each, a d item size. Most decode failu es i etail sca i g deployme ts t ace back to optical defocus caused by subject dista ce va iatio outside the fixed-focus desig poi t.
A VCM autofocus USB came a elimi ates this co st ai t. The le s eleme t moves to the co ect focus positio fo the p ese ted subject dista ce, mai tai i g optical pe fo ma ce ega dless of whethe the QR code is 15 cm o 40 cm f om the se so . Vadzo’s Falco -521CRH is a AR0521 autofocus USB 3.2 came a with M12 VCM autofocus built specifically fo ba code sca i g kiosk came a applicatio s. The 5.1MP AR0521 se so with 2.2μm pixel pitch esolves QR code modules a d ba code ba s eliably at cou te -mou ted kiosk wo ki g dista ces, while the F2.0 ape tu e mai tai s decode pe fo ma ce u de the mixed ambie t illumi atio co ditio s of etail floo e vi o me ts.
VCM (Voice Coil Moto ) autofocus moves the le s eleme t alo g the optical axis by applyi g a co t olled cu e t to a elect omag etic coil. The adjustme t happe s i milliseco ds with epeatability sufficie t to mai tai focus ac oss subject dista ces f om close a ge to i fi ity, depe di g o the le s assembly. I a embedded QR code sca i g came a o autofocus USB 3.2 came a module, the VCM is co t olled eithe by the came a’s i te al co t ast-detectio autofocus algo ithm o by di ect softwa e comma ds f om the host applicatio . Co t ast-detectio autofocus measu es high-f eque cy image co te t i a defi ed egio a d ite atively moves the le s to maximize co t ast, co espo di g to the sha pest focus positio . The host applicatio ca also comma d a specific focus positio di ectly, which is useful i docume t sca i g kiosk came a deployme ts whe e apid focus t a sitio s betwee successive use s equi e dete mi istic behavio athe tha a full autofocus sea ch sweep.
Fo etail ba code a d QR code sca i g, se so a chitectu e, pixel pitch, ape tu e, a d autofocus impleme tatio must be evaluated togethe . A 5MP VCM autofocus came a fo etail sca i g equi es sufficie t pixel cou t to esolve small-fo mat QR code modules a d 1D ba code ba s at 15 cm to 40 cm wo ki g dista ces, e ough ape tu e to pe fo m u de mixed etail illumi atio , a d autofocus that co ve ges fast e ough to match the pace of use -i itiated sca eve ts.
Vadzo’s Falco -521CRH is a 5MP O semi AR0521 VCM autofocus came a with 2.2μm pixel pitch, F2.0 ape tu e, a d 72-deg ee field of view ove USB 3.2 Ge 1. The 2.2μm pixel pitch esolves QR code module st uctu es to pixel cou ts above the 2-3 pixel mi imum equi ed by most decode e gi es at cou te -mou ted wo ki g dista ces. The F2.0 ape tu e p ovides the light collectio eeded fo co siste t decode pe fo ma ce i the va ied illumi atio of a etail kiosk came a e vi o me t without equi i g suppleme tal LED illumi atio ha dwa e.
Fo sma t ve di g machi e came a a d kiosk platfo m i teg atio , USB with full UVC complia ce is the co ect i te face sta da d i the majo ity of deployme t cases. UVC complia ce mea s the came a egiste s as a sta da d video device o Wi dows, Li ux, a d A d oid without custom d ive developme t, elimi ati g d ive compatibility isk ac oss OS ve sio s a d emovi g the d ive mai te a ce bu de ove the p oduct lifecycle. USB 3.2 Ge 1 p ovides 5 Gbps ba dwidth sufficie t fo u comp essed 5MP colo st eami g at 30 fps. Fo a payme t kiosk came a o co tactless sca i g came a applicatio o a embedded PC o si gle-boa d compute host, a si gle USB 3.2 Ge 1 co ectio ha dles both powe a d data, emovi g the eed fo a dedicated powe supply ail. The Falco -521CRH is a VCM autofocus USB 3.2 came a with full UVC complia ce desig ed fo exactly these host platfo m a chitectu es.
Yes. Vadzo Imagi g p ovides full OEM customizatio se vices fo its embedded visio came a po tfolio, i cludi g the Falco -521CRH. OEM customizatio optio s fo etail kiosk a d self-se vice QR code sca i g came a deployme ts i clude boa d edesig a d fo m facto eductio to fit specific e closu e co st ai ts, custom le s a d filte co figu atio s to optimize field of view fo specific ba code subst ate types, fi mwa e modificatio s to impleme t custom autofocus behavio o exposu e co t ol logic, a d LED illumi atio boa d i teg atio fo st obe-sy ch o ized ope atio . ISP tu i g is available to optimize the AR0521 se so output fo the specific lighti g co ditio s of the ta get deployme t e vi o me t. Evaluatio kits a d tech ical docume tatio a e available di ectly f om Vadzo Imagi g. Fo OEM i qui ies, co tact
The Falco -521CRH AR0521 autofocus USB came a is available ow fo OEM evaluatio . Evaluatio kits, tech ical docume tatio , a d i teg atio suppo t a e available di ectly f om Vadzo Imagi g. Volume p ici g, fi mwa e customizatio , optics co figu atio , a d e closu e desig se vices a e available upo equest. Fo i qui ies, co tact the Vadzo sales team at
Vadzo Imagi g develops high-pe fo ma ce embedded a d machi e visio came a p oducts fo OEMs a d system i teg ato s buildi g ext-ge e atio i tellige t systems. The compa y’s USB came a se ies, alo gside MIPI, GigE, Wi-Fi, a d Se Des i te face imagi g platfo ms, suppo ts applicatio s i i dust ial automatio , obotics, sma t su veilla ce, sma t city i f ast uctu e, a d edge AI. Beyo d ha dwa e, Vadzo p ovides e d-to-e d imagi g expe tise, i cludi g se so i teg atio , ISP tu i g, fi mwa e developme t, a d OEM came a customizatio se vices that accele ate developme t a d deployme t at scale.
