CN203789301U

CN203789301U - Moissanite cut in round and bright mode

Info

Publication number: CN203789301U
Application number: CN201420195748.7U
Authority: CN
Inventors: 王林
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-22
Filing date: 2014-04-22
Publication date: 2014-08-27
Anticipated expiration: 2024-04-22

Abstract

The utility model provides a moissanite cut in a round and bright mode. The moissanite sequentially comprises a crown portion, a waist portion and a pavilion portion from top to bottom. The angle of the crown portion of the moissanite is 34 degrees, and the angle of the pavilion portion of the moissanite is 41 degrees. According to the moissanite cut in the round and bright mode, the angle of the crown portion and the angle of the pavilion portion of the moissanite are researched and calculated through the inherent refractive index of the moissanite, so that when refracted or direction rays entering the facet moissanite reach facets of the pavilion, the incidence angle is larger than the critical angle of total reflection, and when the rays are finally reflected to facets of the crown portion, the incidence angle is smaller than the critical angle of total reflection, the rays are emitted from the crown portion of the facet moissanite to the largest extent, and the brightness of the moissanite is greatly improved.

Description

The Mo Sangshi of round bright type cut

[technical field]

The utility model relates to jewelry field, relates in particular to a kind of Mo Sangshi of round bright type cut.

[background technology]

Mo Sangshi (claiming again carborundum, moissanite), composition extract from aerolite, and the molecule (chemical composition SiC) for the combination of carbon silicon, belongs to superhard material, and hardness is 9.25, is the jewel of the second hardness in the world.

Mo Sangshi also can manually manufacture, and artificial synthetic not Sang Shi refractive index is mostly 2.648, a little more than diamond (diamond refractive index is 2.42), its dispersion (0.104) is also good, price is but 1/10th of diamond, therefore, is considered to the best substitute of rough diamond.

At present, the Mo Sangshi as the substitute of round bur adopts the diamond cutting percentage of standard to process conventionally.Therefore yet because Sang Shi is not different from the composition of diamond, intrinsic refractive index is also different, according to the cut of diamond, process the lightness that Sang Shi not can not represent Mo Sangshi well.

[utility model content]

In view of this, be necessary to provide in fact a kind of Mo Sangshi of round bright type cut, it can be good at representing the lightness of Mo Sangshi.

A Mo Sangshi for round bright type cut, described not Sang Shi comprises bizet, waist and booth portion from top to bottom successively.The crown angle of described not Sang Shi is 34 °, and the booth portion angle of described not Sang Shi is 41 °.

In at least one embodiment, the wide ratio of the platform of described not Sang Shi is 53%～60% therein, and waist thickness rate is 2%～3%.

In at least one embodiment, the booth of described not Sang Shi is dark in 43.46% therein.

In at least one embodiment, the crown height ratio of described not Sang Shi is 13.49%～15.85% therein.

Therein at least one embodiment, described not Sang Shi's is complete deeply than being 58.95%～62.31%.

The Mo Sangshi of round bright type cut of the present utility model, by the crown angle of Mo Sangshi and booth portion angle are studied and are calculated, make to enter facet not refraction or the incidence angle of direct projection light when the incidence angle that arrives each facet of booth portion is greater than the cirtical angle of total reflection and finally reflexes to each facet of bizet in Sang Shi be less than the cirtical angle of total reflection, thereby make light to greatest extent from not Sang Shi bizet ejaculation of facet, the lightness that has greatly improved Mo Sangshi.

[accompanying drawing explanation]

Fig. 1 is for adopting the structural representation of the Mo Sangshi of preferred embodiment round bright type cut of the present utility model.

Fig. 2 is the dimensional structure schematic diagram of the Mo Sangshi of the round bright type cut in Fig. 1.

Fig. 3 is the incident ray refraction schematic diagram of the Mo Sangshi of the round bright type cut in Fig. 1.

Fig. 4 is the affect schematic diagram of the bizet facet size of Mo Sangshi on brightness and fire coloured silk.

[specific embodiment]

For understanding better the utility model, below with reference to accompanying drawing and instantiation, utility model is described in detail.

Before the Mo Sangshi of round bright type cut of the present utility model is described, first to circle not each size of Sang Shi define.

Incorporated by reference to consulting Fig. 1, be wherein depicted as the structural representation of the Mo Sangshi of round bright type cut of the present utility model.As shown in fig. 1, similar with diamond, basipetal three parts of Sang Shi 100 are not followed successively by bizet 10, waist 20, booth portion 30.

Incorporated by reference to consulting Fig. 2, the cut ratio of Sang Shi round bright type cut does not refer to that Sang Shi each several part is not with respect to the percentage of average diameter D.Diameter refers to the not diameter of Sang Shi waist circular horizontal plane, and wherein maximum is called maximum gauge, and minimum of a value is called minimum diameter, and the value of (maximum gauge+minimum diameter)/2 is called average diameter D, and unit is millimeter (mm), is accurate to 0.01.

In Sang Shi cut ratio, main scale parameter does not have: platform wide than (Table proportion), booth portion angle (Pavolion angle), crown angle (crown angle), booth deeply than (Pavilion proportion), crown height than (crown proportion), waist thickness rate (Girdle proportion), entirely deeply than (Total Depth proportion).It is defined as follows:

The wide ratio of platform, refers to that mesa width TW is with respect to the percentage of average diameter D, and computing formula is as follows: the wide ratio=mesa width TW/ of platform average diameter D * 100%.

The angle PA of booth portion, refers to the angle of the main facet of booth portion and waist horizontal plane.

Crown angle CA, refers to the angle of the main facet of bizet and waist horizontal plane.

Booth deeply than, refer to that the degree of depth PH of booth portion is with respect to the percentage of average diameter D, computing formula is as follows: booth is deeply than the=degree of depth PH/ of booth portion average diameter D * 100%.

Crown height ratio, refers to that bizet height CH is with respect to the percentage of average diameter D, and computing formula is as follows: crown height ratio=bizet height CH/ average diameter D * 100%.

Waist thickness rate, refers to that waist thickness GH is with respect to the percentage of average diameter D, and computing formula is as follows: waist thickness rate=waist thickness GH/ average diameter D * 100%.

Complete deeply than, refer to the percentage of the complete dark relative average diameter D of TH, computing formula is as follows: complete dark in=Th/ average diameter D * 100% deeply entirely.

The spe-cial optical effects of Sang Shi round bright type cut is not to embody the key character of its aesthetic feeling, be mainly manifested in three aspects: brightness (Intensity), fire color (Fire), flicker (Sparkle), brightness, fire resultant effect color, flicker are called lightness (Brilliance).

Lightness, refers to the not intensity of reflected light of Sang Shi under white light of facet, and it comprises not Sang Shi surface reflection and two parts of internal reflected light, also claims surperficial light and inner light, and the summation of the two is the whole lightness of Mo Sangshi.

The surface reflection of Mo Sangshi is also referred to as gloss.The power of Sang Shi gloss does not depend primarily on refractive index N and the reflectivity R of Mo Sangshi, has following simplification relational expression between the two: the refractive index of Mo Sangshi is 2.648, and to calculate reflectivity be 20.41% to formula thus.From formula, refractive index and reflectivity are proportional.

The surface reflection of Mo Sangshi (gloss) is no doubt important to the contribution of its brightness, but compares with its reflects light effect, and the facet not internal reflection effect of Sang Shi outclass surface reflection effect to the impact of brightness.The reflectivity of Mo Sangshi is 20.41%, that is to say and only have 20.41% incident light to reflect on surface, if allow all the other incident lights of 79.59% enter facet not behind Sang Shi inside, then penetrate from front by internal reflection effect, facet not the brightness of Sang Shi will increase substantially.As can be seen here, internal reflection effect is only and improves the not real potential of Sang Shi brightness of facet facet.

Refer to Fig. 3, when light is irradiated to Sang Shi when inner with incidence angle i from table top, only manage to make to enter facet not refraction or the direct projection light in Sang Shi body in the incidence angle that arrives 30 each facets of booth portion, be greater than cirtical angle of total reflection θ, and the incidence angle while finally reflexing to bizet 10 each facet is less than critical angle θ, so just can make light to greatest extent from facet Sang Shi positive (bizet 10) penetrate.

The critical angle θ of Mo Sangshi is relevant with its refractive index N, can be represented by the formula: by above formula, drawn: Sin θ=1/2.648=0.378, through inquiry table of natural sines draw critical angle θ=22 ° 21 of Mo Sangshi '.

Because refractive index and critical angle are all the inherent optics constants of Mo Sangshi, cannot change, and unique what can change is to make light incident angle during through each facet in entering Sang Shi body not.Therefore, according to the refractive index N of Mo Sangshi and critical angle θ size, come appropriate design facet not cut ratio and the angle of Sang Shi, be only and strengthen the not effective way of Sang Shi brightness.

Facet angle is very obvious on the impact of brightness, especially the angle PA of booth portion and crown angle CA.If these angle design are improper, excessive or too smallly all can cause facet the thickness of Sang Shi is not excessive or too small, make the light can not be from positive outgoing but in the leakage of booth portion, cause not weakening of Sang Shi apparent brightness.Only have when the each several part ratio of cut and angle are when suitable, just can make light produce total internal reflection effect in booth portion, and penetrate from bizet, present good internal reflection light.

If angle PA is excessive in booth portion, can cause the ratio of booth portion excessively dark, make light, in the facet of booth portion, refraction action occur, from booth portion side, spill external (claiming light leakage phenomena for the second time), cause light losing, a little less than brightness; If booth portion angle angle too small, can cause the ratio of booth portion excessively shallow, also make light, in the facet of booth portion, refraction action occur, from the booth portion back side, penetrate leakage (claiming light leakage phenomena for the first time), cause brightness not good.

If crown angle angle is improper, except causing booth portion light leak, also can make when arriving bizet facet, internal reflection again to occur through the internal reflection light of booth portion, finally also to cause the heavy losses of light.

Below by with regard to how to confirm, cut angle and the ratio of Sang Shi are not elaborated.

(1) crown angle, booth portion angle

According to tabling look-up, can learn, when critical angle θ=22 ° 21 ' times, the crown angle CA of round bright type cut is 34 °, and the angle PA of booth portion is 41 °.

(2) the wide ratio of platform, waist thickness rate

According to estimation algorithm, generally for round bright type cut, the wide ratio of platform should be controlled at 53%～60% and be advisable; Waist thickness rate general control is in 2%～3% left and right.

The relative size of the table top of bizet and inclination skill facet is also to affect brightness and the color key factor of fire.As shown in Figure 4, the in the situation that of light vertical irradiation jewel, by only having bizet inclination skill facet could produce that significantly fire is color, therefore, table top ratio is larger, and the shared area of inclination skill facet is just less, and fire is color can be more weak; Otherwise table top ratio is less, the shared area of inclination skill facet is just larger, and fire is color can be stronger.

But on the other hand,, along with table top ratio reduces and the color enhancing of fire, brightness meeting is corresponding to be weakened.And, when table top little to a certain extent after, not only brightness is impaired, fiery coloured silk is impaired too.So table top is not more little more also.Suitable table top ratio should be to make brightness and fiery coloured silk reach good counterbalance effect.It is generally acknowledged, the wide ratio of platform is advisable in 53%～60% scope.

(3) booth deeply than

According to sine, establish the angle CA=A of booth portion, the dark PH=a of booth, Sang Shi average diameter D=b not, a/sinA=0.5b/sin (90 °-A), a=0.5bsinA/sin (90 °-A).The booth portion angle of existing known not Sang Shi is 41 °, according to above formula, can calculate booth deeply than b=0.5sin41 ° of=a/b=0.5bsinA/sin (90 °-A)/sin49 °=43.46%.

(4) crown height ratio

According to sine, establish crown angle CA=C, crown height CH=c, Sang Shi average diameter D=b not, the wide ratio=x of platform, c/sinC=0.5(1-x) b/sin (90 °-C), c=0.5(1-x) bsinC/sin (90 °-C).The crown angle CA of existing known not Sang Shi is 34 °, and the wide ratio of platform is 53%～60%, crown height ratio=c/b=0.5(1-x) bsinC/sin (90 °-C) b=0.5(1-x) sin34 °/sin56 °, crown height ratio is 13.49%～15.85% as calculated.

(5) complete deeply than

If the angle PA=A of booth portion, booth is dark=a, Sang Shi average diameter D=b not, crown angle=C, crown height=c, the wide ratio=x of platform, waist thickness rate=y, complete dark=d, complete deeply than=d/b=(a+c+yb)/b=((0.5bsinA/sin (90 °-A)+0.5(1-x) bsinC/sin (90 °-C)+yb))/b=0.5sinA/sin (90 °-A)+0.5(1-x) sinC/sin (90 °-C)+y.The angle PA of booth portion of existing known not Sang Shi is 41 °, and crown angle CA is 34 °, and the wide ratio of platform is 53%～60%, and waist thickness rate is 2%～3%, complete deeply than being 58.95%～62.31% as calculated.

After above-mentioned data are arranged, the optimal process ratio of the Mo Sangshi of the round bright type cut obtaining is as following table:

The optimal process ratio of the Mo Sangshi of table one round bright type cut

With existing circle not Sang Shi compare, the Mo Sangshi of round bright type cut of the present utility model, by studying the not characteristic of Sang Shi self, obtains bringing into play the not processing ratio of the best lightness of Sang Shi self, thereby expands better the not market of Sang Shi.

The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims

1. a Mo Sangshi for round bright type cut, described not Sang Shi comprises bizet, waist and booth portion from top to bottom successively, it is characterized in that: the crown angle of described not Sang Shi is 34 °, the booth portion angle of described not Sang Shi is 41 °.

2. the Mo Sangshi of round bright type cut according to claim 1, is characterized in that: the wide ratio of platform of described not Sang Shi is 53%～60%, and waist thickness rate is 2%～3%.

3. the Mo Sangshi of round bright type cut according to claim 1, is characterized in that: the booth of described not Sang Shi is dark in 43.46%.

4. the Mo Sangshi of round bright type cut according to claim 1, is characterized in that: the crown height ratio of described not Sang Shi is 13.49%～15.85%.

5. the Mo Sangshi of round bright type cut according to claim 1, is characterized in that: described not Sang Shi's is complete deeply than being 58.95%～62.31%.