Specification

  • The Em1's development programme included laboratory equivalence testing, culminating in practical field trials in tropical locations for a multitude of applications including the diagnosis of malaria and the NTDs (Neglected Tropical Diseases).

     

    A combination of innovative design, simplification and the application of modern manufacturing processes and robust lightweight materials have made the Em1 a reality.

  • Design features

    • Inverted monocular design

    • 3D folded optical path

    • RMS standard optical tube length

    • All models supplied with micrometer XY slide indexer as standard with interchangable slide clips

    • Cavity (fluids) slide supplied as standard

    • Digital camera attachable

    • Mobile phone camera attachable

    • Fine focusing attachment

  • Operability

    • Miniature objectives corrected for 0.17mm cover slip

    • Rotating objective carrier holds up to three objectives

    • Standard RMS eyepiece x10 wide field

    • Built-in white LED illumination

    • Variable illumination

    • External USB power socket

    • Built in battery power saver

    • Battery life approximately 1,000 hours at minimum continuous power

    • Battery life approx. 300 hours at maximum continuous power

    • 2 x standard photographic tripod mounting bushes

  • Materials & weight

    • Die-cast, CNC machined optical sub-chassis

    • Hardened bearing surfaces

    • Die-cast aluminium stage

    • Injection moulded rubber coated PC/ABS case

    • Minimum weight - (Em1 400 with slide clips, USB power, no batteries) 480 grams

    • Size (main body) – Length 133mm, width 110mm, height 49mm

    • Size (max overall) – Length 154mm, width 122mm, height 66mm

  • The Em1 optical system is based on the standard RMS 160mm ‘tube’ length and can accommodate an interchangeable range of standard RMS eyepieces. The compact hand-held form has an inverted design with the optical path folded three dimensionally using one Z axis mirror and two XY axis mirrors. The objective lenses, have been specifically miniaturised for the microscope in order to reduce size and weight.

    The aluminium optical chassis assembly is decoupled from the external moulded casing, providing a high level of protection from physical shock.

    The optical system is illuminated by a white-light balanced miniature light emitting diode. The tube mounting collimates the light source providing a narrow beam. Illumination/contrast levels can be adjusted by moving the light arm angle. The PCB design provides variable brightness control with power options from internal batteries or the external mini USB connection.

  • Objective lenses

    Achromat

    Precision ground Schott glass

    Multi-coated

    Laser aligned

    Plated brass mounts

    CNC machined hard anodised aluminium lens turret

    Corrected for 0.17mm cover slip

    x10 N/A 0.25

    x40 N/A 0.65

    x60 N/A 0.80

    x100 oil N/A 1.25

  • Mirrors

    Precision ground 2.0 mm glass

    Front silvered and coated

    Surface accuracy, mirror No1 = 3-4 fringes

    Surface accuracy, mirror No2 = 5 fringes

    Surface accuracy, mirror No3 = 5 fringes

  • Optical chassis and focus carriage

    Precision high pressure die-cast aluminium alloy

    CNC machined mirror mounts: Linear +/- 0.1mm, angular +/-0.25 degrees

    CNC machined bores and shafts: Diametric +/- 0.015mm

    Fully hardened rotational and sliding bearing surfaces

    General surfaces aluminium oxide pressure blasted and black anodised