58 Main Street, Sturbridge, MA 01566
Phone: (508) 347-2009     e-mail: jbv@jbvoptical.com


JBV's High Quality Optics in Amphibico's Underwater Camera Systems

 


Amphibico's 3rd Generation, state-of-the-art high definition underwater camera systems employ high quality Aspheric glass and plastic lenses designed by Dr. Paul Remijan, and realized by JBV Optical Products Company's expertise.

The Amphibico Generation III Advanced HDTV System

High Definition Adapter for Canon HDTV Lens HJ9X5.5B
Amphibico's new High Definition Adapter "HDA" allows high resolution underwater photography with Canon's new line of High Definition TV Lenses. Amphibico's HDA adapter delivers distortion-free wide angle images while maintaining full zoom capability for high resolution "close-ups". The formation of high quality images in both air and water provides the convenience of dual air and underwater operation. Angular magnification is nearly constant in both air and water allowing for "split images" with minimum shear along the air-water boundary.

COMPATIBILITY

2/3 inch HD Format, (9.59 x 5.39 mm)
HDTV Lenses- (5.5 < fl < 100 mm; min f/# < 2.0)

OPTICAL FEATURES

Advanced optical fabrication technology, proprietary plastic materials and powerful multi-configuration computer optimization have been used to produce the new HDA lens. The lens produces sharp, distortion free images with vivid colors. Sharp, vivid, color images free of distortion are formed at all zoom settings and for all object distances. The HDA dome provides consistent optical performance because the proprietary plastic dome material has water absorption of < or = 0.001%. Other plastics such as acrylic exhibit water absorption of approx. 0.3%.

DISTORTION FREE

A deep concave dome operating in conjunction with internal high index optics forms a flat image at the CCD image sensor. Distortion is corrected for both near and distant objects framed at any zoom setting.

COLOR CORRECTED

An achromatic doublet fabricated from special high index glasses provides excellent color correction over the entire field of view at all magnifications.

USE IN AIR OR WATER

Nearly constant angular magnification in air and water is achieved by using a highly curved, non-concentric plastic dome. Variation of angular magnification in air versus water ranges from 5% for near objects at 5.5 mm fl to 9% for distant objects at 100 mm fl. "Split Images" with as little as 5% shear at the air-water interface are possible.

FULL ZOOM CAPABILITY

A "Focus Corrector Group" compensates for the water-dome or air-dome interface which naturally acts as a negative lens to limit focusing. Objects as close as 110 mm from the dome vertex, (230 mm from dome vertex in water), can be brought into clear focus at full zoom, 100 mm fl.

HIGH RESOLUTION

High polychromatic MTF compatibility with HDTV requirements is maintained over the entire field by supressing the astigmatism usually found in less sophisticated wide angle lenses.

DURABLE OPTICAL COATINGS

All optical surfaces are (H)igh (E)fficiency (B)road (B)and (A)nti-(R)eflection, (HEBBAR), coated. The external plastic dome surface has a proprietary, seawater resistant, HEBBAR hard coating which reduces scratches and allows aggressive cleaning to remove seawater residue.

The formidable optical expertise of Dr. Paul Remijan and JBV Optical Products Company has been employed in the medical, military and industrial sectors for years. JBV Optical offers you the opportunity to have this same level of impeccable quality focused on your specific application. We welcome the opportunity to provide you quotes on your optical requirements. JBV's design and engineering services are light-years ahead.

Generation III HDA Optical Specifications
Click here to view graphs of:
Field Curvature/Distortion, & Grid Distortion

Generaton III Specifications FL = 5.5 mm FL = 100 mm
Water Air Water Air
Minimum object distance (M.O.D.) from Dome Vertex 230* mm 110* mm 230 mm 110 mm
Maximum distortion for object @ M.O.D <1.7% <2.0% <0.01% <0.02%
Maximum distortion for object at Infinity <1.8% <2.2% <0.02% <0.02%
Object fields for 1/3" CCD format Water Air Water Air
Object dimensions at 2 meters from Dome Vertex (mm) 3828
X
2153
4002
X
2251
202.5
X
113.9
220.0
X
123.7
Object dimensions at 230 mm from dome vertex (mm) 697
X
392
782
X
440
36.6
X
20.6
32.8
X
21.5
Angular F.O.V. for Object @ Infinity Referenced to Entrance Pupil (Degrees) 83.4
X
53.2
86.1
X
55.4
5.42
X
3.05
5.90
X
3.32

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