Light / Optics

Spherical. Highly polished and well edged made from plate glasses.

Spherical. Highly polished and well edged made from plate glass.

Spherical, highly polished and well edged, made from extra white glass. Dia. 50 mm. Focal length 5, 10, 15, 20, 25, 30, 40, 50, 100 cm.

Spherical, highly polished and well edged, made from extra white glass. Dia. 50 mm. Focal length 5, 10, 15, 20, 25, 30, 40, 50, 100 cm.

Consisting of one flat glass plate and one plano convex lens of focal length 100 cm or 200 cm with lenses made from.

Plano convex lens for magic lanterns and photographic enlargers.

Plano-convex lenses having one flat surface and one spherical with positive focal length, manufactured from flint plate glass as well as from white glass.

Set of six lenses. Dia 50 mm, 38 mm. Consisting of one lens each of Double Convex (+2.50 / +2.5D), Plano Convex (+2D), Double Concave (-2.5D / -2.5D), Plano Concave (-2.5D), Double Convex (+2D / +2D). Packed in a velvet lined case.

For demonstration of the principle of the diffraction grating and the way in which its properties are dependent upon the number of lines per unit length. Comprises 2 card mount 90 × 40 mm approximately with three 16 × 9 mm apertures, each containing a diffraction grating replica. Gratings are of 100 lines/mm, 300 lines/mm and 600 lines/mm respectively, protected by cover glasses.

A) Watch Makers Eye Loupe available in magnification of 1x, 2x, 3x, 4x, 5x, 10x.
B) Watch Makers Double Eye Loupe available in magnification of 10x, 12x, 14x.

Optically worked. Made from Crown glass.
A) 40 × 30 mm
B) 50 × 40 mm.

Nicely cemented at edges with adhesive, with stopper.
a) Size 38 × 38 × 38 mm
b) Size 50 × 50 × 50 mm.

All sides polished. Made from Bubble free sheet glass.
a) Size 100 × 18 mm
b) Size 90 × 18 mm.

Made from Bubble free sheet glass. All sides polished.
a) 75 × 50 × 12 mm
b) 75 × 50 × 18 mm
c) 100 × 50 × 18 mm
d) 100 × 60 × 18 mm
e) 115 × 65 × 18 mm
f) 125 × 65 × 18 mm

Made from moulded glass. All sides polished.
a) Size 75 × 50 × 18 mm
b) Size 100 × 60 × 25 mm.

Thread Counter. Brass chrome plated body.
Size: 1/4" × 1/2" × 1" combined.
a) Size: 1" × 1" × 1".

Specially designed fully coated high precision optics, provides colour-free, sharp & crystal clear view across a field wide enough (44 mm) to cover a 35 mm film, diagonally at a single setting. Comes with choice of 3 stands: transparent, opaque & cutaway. Six thread spiral twist focus for fast & accurate focusing & a lock ring to keep the focus in place.
Magnification: 4x
Field of view: 44 mm
Working distance: 52 mm

General purpose magnifiers. A set of four models to cover all applications of hand held magnifiers. Precision lenses made of optical grade acrylic; flexible stand also offered.
a) Magnification 3x; field 20 mm; working distance 40 mm
b) Magnification 2.5x; field 30 mm; working distance 50 mm
c) Magnification 2.25x; field 60 mm; working distance 85 mm
d) Magnification 2.0x; field 95 mm × 65 mm; working distance 105 mm

Handy table top magnifier, having stand with side openings allowing illumination and easy accessibility of tools to the object being viewed.
Magnification: 2.5x
Field of view: 30 mm
Working distance: 50 mm

With adjustable focusing, useful for elementary biology and dissection work. Dia: 38 mm. Magnification: 6x.

Handy magnifier using precision moulded acrylic lenses. Has a spiral twist focus enabling individual eye adjustment.
Magnification: 6x
Field of view: 22 mm
Working distance: 25 mm

Lenses mounted in Unbreakable Plastic mount with Single / Double / Triple lens configurations.

Magnification 10x, mounted in an unbreakable plastic holder.
a) aluminium anodised cover
b) brass chrome plated cover for protection, with glass lenses.

General purpose magnifier. Lens swivels out of a protective case which doubles as a handle. Break-resistant lens made of optical grade acrylic.
Magnification: 6x
Field of view: 20 mm
Working distance: 30 mm

Folding type, with leather cover for protection.
Dia: 48 mm; Magnification 4x.

Magnification 10x. Combination of two lenses. Dia approx. 28 mm.

Consisting of Double Convex lenses fitted in plastic frames. Available in Dia 38 mm, 40 mm, 50 mm, 60 mm, 75 mm.

Highly chromed magnifiers. Specifications supplied as diameter, magnification, focal length and dioptric power.

Double convex lenses mounted in brass frame, Bakelite handle with brass knob, duly bright chrome plated, packed in cardboard boxes.

Crane magnifiers mounted on a horse shoe shaped wrinkle painted base with universal ball and socket arrangement and 150 mm long arm to adjust the lens in any desired position. Magnification 2.25x.
a) Dia 75 mm
b) Dia 100 mm

A sophisticated high power stand magnifier with a graticule (reticle) holding attachment. Clear acrylic stand allows ambient light illumination; spiral twist mechanism for precision focusing and 2 focus lock rings. Choice of thirteen different graticules. Protective moulded case & dust cover.
Magnification: 8x
Field of view: 22 mm
Working distance: 20 mm

Consisting of a lens holder with horizontal arm and vertical rod with proper clamps, chrome plated for holding the horizontal arm, both lateral distance and height adjustable. Heavy wrinkle painted base. Magnification 2.25x.
A) Dia 75 mm
B) Dia 100 mm

a) Wooden.
b) Plastic.

With copper protected silvering.
Size: 100 × 25 mm, 100 × 50 mm, 75 × 50 mm, 100 × 75 mm.

Optically true spherical. Duly silvered. Concave or convex. Available in focal length 10 / 15 / 20 & 25 cm; Dia: 50 / 60 / 75 mm.

Spherical. Optically true. Highly silvered, with protective coating. Concave or convex.
Dia 50 mm: focal length 7.5/10/15/20/25/30 cm
Dia 60 mm: focal length 10/12.5/15/20/25/30 cm
Dia 75 mm: focal length 10/12.5/15/20/25/30 cm
Dia 100 mm: focal length 10/12.5/15/20/25/30 cm
Dia 150 mm: focal length 10/12.5/15/20/25/30 cm

Transmission type grating available in 100, 300, 600 lines/mm. Grating size 25 × 25 mm & 50 × 38 mm.

Mounted, 50 mm size.

Equilateral. All sides polished, made from moulded glass.
a) 25 × 25 mm ht
b) 38 × 38 mm ht
c) 50 × 50 mm ht

Right angled. Nominal angles 90° × 45° × 45°. All sides polished, made from moulded glass.
a) 25 × 25 mm ht
b) 38 × 38 mm ht
c) 50 × 50 mm ht

Right angled. Made from Bubble free white glass. Nominal angles 90° × 45° × 45°.
a) 25 × 25 mm ht
b) 32 × 32 mm ht
c) 35 × 35 mm ht
d) 38 × 38 mm ht

Equilateral. Made from Bubble free white glass.
a) 25 × 25 mm ht
b) 25 × 32 mm ht
c) 35 × 35 mm ht
d) 38 × 38 mm ht

Equilateral, nicely cemented at edges with white adhesive, with stopper.
a) Size 38 × 38 mm
b) Size 50 × 50 mm

Optically worked, made from Crown glass. Size 32 × 32 mm ht.
Angles: a) 5° × 170° × 5°; b) 10° × 100° × 160°; c) 15° × 15° × 140°; d) 20° × 20° × 140°; e) 20° × 50° × 110°; f) 30° × 30° × 120°; g) 40° × 40° × 100°; h) 45° × 45° × 90°

Optically worked, made from Crown glass. Size 32 × 32 mm ht.
Angles: a) 5° × 87.5° × 87.5°; b) 10° × 85° × 85°; c) 15° × 82.5° × 82.5°; d) 20° × 80° × 80°; e) 25° × 77.5° × 77.5°; f) 30° × 75° × 75°; g) 40° × 70° × 70°; h) 30° × 60° × 90°

Equilateral, optically worked.
Borosilicate Crown Glass (Crown) (Refractive Index 1.51)
a) 25 × 25 mm ht; b) 32 × 32 mm ht; c) 38 × 38 mm ht
DENSE FLINT GLASS (DF) (Refractive Index 1.62)
a) 25 × 25 mm ht; b) 32 × 32 mm ht; c) 38 × 38 mm ht
Extra Dense Flint Glass (EDF) (Refractive Index 1.65)
a) 25 × 25 mm ht; b) 32 × 32 mm ht; c) 38 × 38 mm ht
DOUBLE EXTRA DENSE FLINT GLASS (DEDF) (Refractive Index 1.70)
a) 25 × 25 mm ht; b) 32 × 32 mm ht; c) 38 × 38 mm ht

prism

Designed to provide progression of ideas from the principles of refraction in prisms to the properties of lenses. Each Perspex prism is in the form of a narrow isosceles triangle 15 × 60 × 20 mm (base × height × thickness). When placed base to base a convex lens may be simulated, and a concave lens when vertex to vertex.

60° × 60° × 60°. Clear Perspex; polished surfaces.
Length / Face: a) 38 mm / 38 mm; b) 63 mm / 63 mm

90° × 45° × 45°. All faces fully polished. Hypotenuse × Length: a) 35 mm × 25 mm; b) 70 mm × 40 mm

The optical bench set provides all requirements in one kit for a whole range of optical experiments. Components are mounted on a 1 m bench using precision-made sliding saddles for smooth movement.
Optical bench components: 6 sliding saddles with mounting screws; 4 mounted convex lenses 50 mm, 100 mm, 150 mm, 200 mm focal length; 1 mounted concave lens 100 mm focal length (50 mm diameter); 1 lamp housing with lamp; 1 candle holder mount; 1 white screen; 1 stop holder with two sliding stops.

Comprising a die-cast box provided with two core lead terminating in a pair of 4 mm plugs. Integral side rails are equipped with slots to accommodate 45 mm wide lens and double-ended single / triple slit plate.

With triangular base and open tapered circular scale. Scale is divided 0–360° × 1°. Independently rotatable with locking screw. A spring-loaded vernier is attached to the telescope mount and moves along the main scale giving reading of 6 minutes of arc.